Merge branch 'release/v1.28.3'

Release v1.28.2

.chglog/CHANGELOG.tpl.md

@@ -1,47 +0,0 @@
-# Changelog
-
-Notable changes to Mailpit will be documented in this file.
-
-{{ if .Versions -}}
-{{ if .Unreleased.CommitGroups -}}
-## [Unreleased]
-
-{{ if .Unreleased.CommitGroups -}}
-{{ range .Unreleased.CommitGroups -}}
-### {{ .Title }}
-{{ range .Commits -}}
-- {{ if .Scope }}**{{ .Scope }}:** {{ end }}{{ .Subject }}
-{{ end }}
-{{ end }}
-{{ end -}}
-{{ end -}}
-{{ end -}}
-
-{{ range .Versions }} 
-{{- if .CommitGroups -}}
-## [{{ .Tag.Name }}]
-
-{{ if .NoteGroups -}}
-{{ range .NoteGroups -}}
-### {{ .Title }}
-{{ range .Notes }}
-{{ .Body }}
-{{ end -}}
-{{ end }}
-{{ end -}}
-{{ end -}}
-
-{{ range .CommitGroups -}}
-### {{ .Title }}
-{{ range .Commits -}}
-- {{ if .Scope }}**{{ .Scope }}:** {{ end }}{{ .Subject }}
-{{ end }}
-{{ end }}
-
-{{- if .MergeCommits -}}
-### Pull Requests
-{{ range .MergeCommits -}}
-- {{ .Header }}
-{{ end }}
-{{ end }}
-{{ end -}}

.chglog/RELEASE.tpl.md

@@ -1,12 +0,0 @@
-{{ if .Versions -}}
-{{ range .Versions }} 
-{{- if .CommitGroups -}}
-{{ range .CommitGroups -}}
-### {{ .Title }}
-{{ range .Commits -}}
-- {{ if .Scope }}**{{ .Scope }}:** {{ end }}{{ .Subject }}
-{{ end }}
-{{ end -}}
-{{ end -}}
-{{ end -}}
-{{ end -}}

.chglog/config.yml

@@ -1,46 +0,0 @@
-style: github
-template: CHANGELOG.tpl.md
-info:
-  title: CHANGELOG
-  repository_url: https://github.com/axllent/mailpit
-options:
-  commits:
-    # filters:
-    #   Type:
-    #     - feat
-    #     - fix
-    #     - perf
-    #     - refactor
-  commit_groups:
-    title_maps:
-      feature: Feature
-      fix: Fix
-    #   perf: Performance Improvements
-    #   refactor: Code Refactoring
-    sort_by: Custom
-    title_order:
-      - Feature
-      - Chore
-      - UI
-      - API
-      - Libs
-      - Docker
-      - Security
-      - Fix
-      - Bugfix
-      - Docs
-      - Swagger
-      - Build
-      - Testing
-      - Test
-      - Tests
-      - Pull Requests
-  header:
-    pattern: "^(\\w*)(?:\\(([\\w\\$\\.\\-\\*\\s]*)\\))?\\:\\s(.*)$"
-    pattern_maps:
-      - Type
-      - Scope
-      - Subject
-  notes:
-    keywords:
-      - BREAKING CHANGE

.github/FUNDING.yml

@@ -1,3 +1,4 @@
 # These are supported funding model platforms
 
 github: [axllent]
+thanks_dev: u/gh/axllent

.github/SECURITY.md

@@ -0,0 +1,21 @@
+# Reporting security vulnerabilities
+
+Your efforts to responsibly disclose your findings are appreciated.
+
+**Please do not report security vulnerabilities through public GitHub issues.**
+
+If you believe you have found a security vulnerability, you can report it using one of the following methods:
+
+1. **GitHub Security Advisory (Recommended):** Use the "Report a vulnerability" button in the [Security tab](../../security/advisories/new) of this repository.
+2. **Email:** Send your findings to security@axllent.org
+
+Your report should include:
+
+- Mailpit version
+- A vulnerability description
+- Reproduction steps (if applicable)
+- Any other details you think are likely to be important
+
+You should receive an initial acknowledgement within 24 hours in most cases, and will be kept updated throughout the process.
+
+With your consent, your contributions will be publicly acknowledged.

.github/cliff.toml

@@ -0,0 +1,49 @@
+## https://git-cliff.org/
+[changelog]
+body = """
+{% if version %}\
+  \n## [{{ version }}]
+{% else %}\
+  \n## Unreleased
+{% endif %}\
+{% for group, commits in commits | group_by(attribute="group") %}
+  ### {{ group | striptags | trim | upper_first }}\
+  {% for commit in commits %}
+    - {{ commit.message | upper_first }}\
+  {% endfor %}
+{% endfor %}\n
+"""
+footer = ""
+header = "# Changelog\n\nNotable changes to Mailpit will be documented in this file."
+postprocessors = [
+  {pattern = "reponse", replace = "response"},
+  {pattern = "messsage", replace = "message"},
+  {pattern = '(?i) go modules', replace = " Go dependencies"},
+  {pattern = '(?i) node modules', replace = " node dependencies"},
+  {pattern = '#([0-9]+)', replace = "[#$1](https://github.com/axllent/mailpit/issues/$1)"},
+]
+trim = true
+
+[git]
+# HTML comments added for grouping order, stripped on generation
+commit_parsers = [
+  {body = ".*security", group = "<!-- 1 -->Security"},
+  {message = "(?i)^security", group = "<!-- 1 -->Security"},
+  {message = "(?i)^feat", group = "<!-- 2 -->Feature"},
+  {message = "(?i)^chore", group = "<!-- 3 -->Chore"},
+  {message = "(?i)^libs", group = "<!-- 3 -->Chore"},
+  {message = "(?i)^ui", group = "<!-- 3 -->Chore"},
+  {message = "(?i)^api", group = "<!-- 4 -->API"},
+  {message = "(?i)^fix", group = "<!-- 5 -->Fix"},
+  {message = "(?i)^doc", group = "<!-- 6 -->Documentation", default_scope = "unscoped"},
+  {message = "(?i)^swagger", group = "<!-- 6 -->Documentation", default_scope = "unscoped"},
+  {message = "(?i)^test", group = "<!-- 7 -->Test"},
+]
+
+# Exclude commits that are not matched by any commit parser.
+# filter_commits = true
+# Order releases topologically instead of chronologically.
+# topo_order = true
+# Order of commits in each group/release within the changelog.
+# Allowed values: newest, oldest
+sort_commits = "oldest"

.github/dependabot.yml

@@ -8,16 +8,16 @@ updates:
   - package-ecosystem: "gomod"
     directory: "/" # Location of package manifests
     schedule:
-      interval: "monthly"
+      interval: "quarterly"
   - package-ecosystem: "github-actions"
     directory: "/" # Location of package manifests
     schedule:
-      interval: "monthly"
+      interval: "quarterly"
   - package-ecosystem: "docker"
     directory: "/" # Location of package manifests
     schedule:
-      interval: "monthly"
+      interval: "quarterly"
   - package-ecosystem: "npm"
     directory: "/"
     schedule:
-      interval: "monthly"
+      interval: "quarterly"

.github/workflows/build-docker-edge.yml

@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
 
     - name: Set up QEMU
       uses: docker/setup-qemu-action@v3

.github/workflows/build-docker.yml

@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
 
     - name: Set up QEMU
       uses: docker/setup-qemu-action@v3
@@ -48,6 +48,6 @@ jobs:
           axllent/mailpit:latest
           axllent/mailpit:${{ github.ref_name }}
           axllent/mailpit:v${{ steps.semver_parser.outputs.major }}.${{ steps.semver_parser.outputs.minor }}
-          ghcr.io/${{ github.repository }}:latest
           ghcr.io/${{ github.repository }}:${{ github.ref_name }}
           ghcr.io/${{ github.repository }}:v${{ steps.semver_parser.outputs.major }}.${{ steps.semver_parser.outputs.minor }}
+          ghcr.io/${{ github.repository }}:latest

.github/workflows/close-stale-issues.yml

@@ -10,12 +10,13 @@ jobs:
       issues: write
       pull-requests: write
     steps:
-      - uses: actions/stale@v9.1.0
+      - uses: actions/stale@v10.1.1
         with:
           days-before-issue-stale: 7
           days-before-issue-close: 3
           exempt-issue-labels: "enhancement,bug,awaiting feedback"
           stale-issue-label: "stale"
+          close-issue-reason: "completed"
           stale-issue-message: "This issue has been marked as stale because it has been open for 7 days with no activity."
           close-issue-message: "This issue was closed because there has been no activity since being marked as stale."
           days-before-pr-stale: -1

.github/workflows/codeql-analysis.yml

@@ -38,7 +38,7 @@ jobs:
 
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL

.github/workflows/release-build.yml

@@ -21,12 +21,12 @@ jobs:
           - goarch: arm
             goos: windows
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v6
 
     # build the assets
-    - uses: actions/setup-node@v4
+    - uses: actions/setup-node@v6
       with:
-        node-version: 18
+        node-version: 22
         cache: 'npm'
     - run: echo "Building assets for ${{ github.ref_name }}"
     - run: npm install

.github/workflows/tests-rqlite.yml

@@ -0,0 +1,29 @@
+name: Tests (rqlite)
+on:
+  pull_request:
+    branches: [ develop, 'feature/**' ]
+  push:
+    branches: [ develop, 'feature/**' ]
+
+jobs:
+  test-rqlite:
+    runs-on: ubuntu-latest
+    services:
+      rqlite:
+        image: rqlite/rqlite:latest
+        ports:
+          - 4001:4001
+        env:
+          # the HTTP address the rqlite node should advertise
+          HTTP_ADV_ADDR: "localhost:4001"
+    steps:
+      - uses: actions/checkout@v6
+      - name: Setup Go
+        uses: actions/setup-go@v6
+        with:
+          go-version: 'stable'
+          cache-dependency-path: "**/*.sum"
+      - run: go test -p 1 ./internal/storage ./server ./internal/smtpd ./internal/pop3 ./internal/tools ./internal/html2text ./internal/htmlcheck ./internal/linkcheck -v
+        env:
+          # set Mailpit to use the rqlite service container
+          MP_DATABASE: "http://localhost:4001"

.github/workflows/tests.yml

@@ -8,17 +8,17 @@ jobs:
   test:
     strategy:
       matrix:
-        go-version: ['1.23']
+        go-version: [stable]
         os: [ubuntu-latest, windows-latest, macos-latest]
     runs-on: ${{ matrix.os }}
     steps:
-    - uses: actions/setup-go@v5
+    - uses: actions/setup-go@v6
       with:
         go-version: ${{ matrix.go-version }}
         cache: false
-    - uses: actions/checkout@v4
-    - name: Run Go tests
-      uses: actions/cache@v4
+    - uses: actions/checkout@v6
+    - name: Set up Go environment
+      uses: actions/cache@v5
       with:
         path: |
           ~/.cache/go-build
@@ -26,24 +26,36 @@ jobs:
         key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
         restore-keys: |
           ${{ runner.os }}-go-
-    - run: go test -p 1 ./internal/storage ./server ./internal/smtpd ./internal/pop3 ./internal/tools ./internal/html2text ./internal/linkcheck -v
-    - run: go test -p 1 ./internal/storage ./internal/html2text -bench=.
+    - name: Test Go linting (gofmt)
+      if: startsWith(matrix.os, 'ubuntu') == true
+      # https://olegk.dev/github-actions-and-go
+      run: gofmt -s -w . && git diff --exit-code
+    - name: Run Go tests
+      run: go test -p 1 ./internal/storage ./server ./internal/smtpd ./internal/pop3 ./internal/tools ./internal/html2text ./internal/htmlcheck ./internal/linkcheck -v
+    - name: Run Go benchmarking
+      run: go test -p 1 ./internal/storage ./internal/html2text -bench=.
     
     # build the assets
-    - name: Build web UI
+    - name: Set up node environment
       if: startsWith(matrix.os, 'ubuntu') == true
-      uses: actions/setup-node@v4
+      uses: actions/setup-node@v6
       with:
-        node-version: 18
+        node-version: 22
         cache: 'npm'
-    - if: startsWith(matrix.os, 'ubuntu') == true
+    - name: Install JavaScript dependencies
+      if: startsWith(matrix.os, 'ubuntu') == true
       run: npm install
-    - if: startsWith(matrix.os, 'ubuntu') == true
+    - name: Run JavaScript linting
+      if: startsWith(matrix.os, 'ubuntu') == true
+      run: npm run lint
+    - name: Test JavaScript packaging
+      if: startsWith(matrix.os, 'ubuntu') == true
       run: npm run package
 
-    # validate the swagger file
-    - name: Validate OpenAPI definition
-      if: startsWith(matrix.os, 'ubuntu') == true
-      uses: swaggerexpert/swagger-editor-validate@v1
-      with:
-        definition-file: server/ui/api/v1/swagger.json
+    # # validate the swagger file
+    # - name: Validate OpenAPI definition
+    #   if: startsWith(matrix.os, 'ubuntu') == true
+    #   uses: swaggerexpert/swagger-editor-validate@v1
+    #   with:
+    #     definition-file: server/ui/api/v1/swagger.json
+    #     default-timeout: 20000

.prettierignore

@@ -0,0 +1,9 @@
+# Not within the scope of Prettier
+**/*.yml
+**/*.yaml
+**/*.json
+**/*.md
+**/*.css
+**/*.html
+**/*.scss
+composer.lock

.vscode/settings.json

@@ -0,0 +1,40 @@
+{
+    "[vue]": {
+        "editor.defaultFormatter": "esbenp.prettier-vscode"
+    },
+    "[javascript]": {
+        "editor.defaultFormatter": "esbenp.prettier-vscode"
+    },
+    "cSpell.words": [
+        "AUTHCRAMMD",
+        "AUTHLOGIN",
+        "AUTHPLAIN",
+        "bordercolor",
+        "CRAMMD",
+        "dateparse",
+        "EHLO",
+        "ESMTP",
+        "EXPN",
+        "gofmt",
+        "Healthz",
+        "HTTPIP",
+        "Inlines",
+        "jhillyerd",
+        "leporo",
+        "lithammer",
+        "livez",
+        "Mechs",
+        "navhtml",
+        "neostandard",
+        "nolint",
+        "popperjs",
+        "readyz",
+        "RSET",
+        "shortuuid",
+        "SMTPTLS",
+        "swaggerexpert",
+        "UITLS",
+        "VRFY",
+        "writef"
+    ]
+}

CONTRIBUTING.md

@@ -0,0 +1,61 @@
+# Contributing guide
+
+Thank you for your interest in contributing to Mailpit, your help is greatly appreciated! Please follow the guidelines below to ensure a smooth contribution process.
+
+
+## Code of conduct
+
+Please be respectful and considerate in all interactions. Mailpit is open source and free of charge, however is the result of thousands of hours of work.
+
+
+## Reporting issues and feature requests
+
+If you find a bug or have a feature request, please [open an issue](https://github.com/axllent/mailpit/issues) and provide as much detail as possible. Pleas do not report security issues here (see below).
+
+
+## Reporting security issues
+
+Please do not report security issues publicly in GitHub. Refer to [SECURITY document](https://github.com/axllent/mailpit/blob/develop/.github/SECURITY.md) for instructions and contact information.
+
+
+
+## How to contribute (pull request)
+
+1. **Fork the repository**  
+   Click the "Fork" button at the top right of this repository to create your own copy.
+
+2. **Clone your fork**  
+   ```bash
+   git clone https://github.com/your-username/mailpit.git
+   cd mailpit
+   ```
+
+3. **Create a branch**  
+   Use a descriptive branch name:
+   ```bash
+   git checkout -b feature/your-feature-name
+   ```
+
+4. **Make your changes**  
+   Write clear, concise code and include comments where necessary.
+
+5. **Test your changes**  
+   Run all tests to ensure nothing is broken. This is a mandatory step as pull requests cannot be merged unless they pass the automated testing.
+
+6. **Ensure your changes pass linting**  
+   Ensure your changes pass the [code linting](https://mailpit.axllent.org/docs/development/code-linting/) requirements. This is a mandatory step as pull requests cannot be merged unless they pass the automated linting tests.
+
+7. **Commit and push**  
+   Write a clear commit message:
+   ```bash
+   git add .
+   git commit -m "Describe your changes"
+   git push origin feature/your-feature-name
+   ```
+
+8. **Open a pull request**  
+   Go to your fork on GitHub and open a pull request against the `develop` branch. Fill out the PR template and describe your changes.
+
+---
+
+Thank you for helping make this project awesome!

Dockerfile

@@ -25,6 +25,6 @@ RUN apk upgrade --no-cache && apk add --no-cache tzdata
 
 EXPOSE 1025/tcp 1110/tcp 8025/tcp
 
-HEALTHCHECK --interval=15s CMD /mailpit readyz
+HEALTHCHECK --interval=15s --start-period=10s --start-interval=1s CMD ["/mailpit", "readyz"]
 
 ENTRYPOINT ["/mailpit"]

README.md

@@ -68,12 +68,18 @@ Mailpit runs as a single binary and can be installed in different ways:
 - **FreeBSD**: `pkg install mailpit`
 
 
-### Install via bash script (Linux & Mac)
+### Install via script (Linux & Mac)
 
 Linux & Mac users can install it directly to `/usr/local/bin/mailpit` with:
 
-```bash
-sudo bash < <(curl -sL https://raw.githubusercontent.com/axllent/mailpit/develop/install.sh)
+```shell
+sudo sh < <(curl -sL https://raw.githubusercontent.com/axllent/mailpit/develop/install.sh)
+```
+
+You can also change the install path to something else by setting the `INSTALL_PATH` environment, for example:
+
+```shell
+INSTALL_PATH=/usr/bin sudo sh < <(curl -sL https://raw.githubusercontent.com/axllent/mailpit/develop/install.sh)
 ```
 
 
@@ -109,3 +115,10 @@ Please refer to [the documentation](https://mailpit.axllent.org/docs/install/tes
 Mailpit's SMTP server (default on port 1025), so you will likely need to configure your sending application to deliver mail via that port. 
 A common MTA (Mail Transfer Agent) that delivers system emails to an SMTP server is `sendmail`, used by many applications, including PHP. 
 Mailpit can also act as substitute for sendmail. For instructions on how to set this up, please refer to the [sendmail documentation](https://mailpit.axllent.org/docs/install/sendmail/).
+
+---
+
+<p align="center">
+  For team features, multiple inboxes, and a hosted setup, try
+  <a href="https://mailtrap.io/?ref=mailpit">Mailtrap</a>, our friendly companion.
+</p>

SECURITY.md

@@ -1,19 +0,0 @@
-# Reporting security vulnerabilities
-
-Your efforts to responsibly disclose your findings are appreciated.
-
-** **Please do _not_ report security vulnerabilities through public GitHub issues.** **
-
-If you believe you have found a **security vulnerability**, then please report it to security@axllent.org so 
-your findings can be investigated, and if confirmed, fixed and released in a timely manner.
-
-Your report should include:
-
-- Mailpit version
-- A vulnerability description
-- Reproduction steps (if applicable)
-- Any other details you think are likely to be important
-
-You should receive an initial acknowledgement within 24 hours in most cases, and will kept updated throughout the process. 
-
-With your consent, your contributions will be publicly acknowledged.

cmd/dump.go

@@ -0,0 +1,36 @@
+package cmd
+
+import (
+	"github.com/axllent/mailpit/config"
+	"github.com/axllent/mailpit/internal/dump"
+	"github.com/axllent/mailpit/internal/logger"
+	"github.com/spf13/cobra"
+)
+
+// dumpCmd represents the dump command
+var dumpCmd = &cobra.Command{
+	Use:   "dump <database> <output-dir>",
+	Short: "Dump all messages from a database to a directory",
+	Long: `Dump all messages stored in Mailpit into a local directory as individual files.
+
+The database can either be the database file (eg: --database /var/lib/mailpit/mailpit.db) or a
+URL of a running Mailpit instance (eg: --http http://127.0.0.1/). If dumping over HTTP, the URL
+should be the base URL of your running Mailpit instance, not the link to the API itself.`,
+	Args: cobra.ExactArgs(1),
+	Run: func(_ *cobra.Command, args []string) {
+		if err := dump.Sync(args[0]); err != nil {
+			logger.Log().Fatal(err)
+		}
+	},
+}
+
+func init() {
+	rootCmd.AddCommand(dumpCmd)
+
+	dumpCmd.Flags().SortFlags = false
+
+	dumpCmd.Flags().StringVar(&config.Database, "database", config.Database, "Dump messages directly from a database file")
+	dumpCmd.Flags().StringVar(&config.TenantID, "tenant-id", config.TenantID, "Database tenant ID to isolate data (optional)")
+	dumpCmd.Flags().StringVar(&dump.URL, "http", dump.URL, "Dump messages via HTTP API (base URL of running Mailpit instance)")
+	dumpCmd.Flags().BoolVarP(&logger.VerboseLogging, "verbose", "v", logger.VerboseLogging, "Verbose logging")
+}

cmd/ingest.go

@@ -30,7 +30,7 @@ Mailpit server. Each email must be a separate file (eg: Maildir format, not mbox
 The --recent flag will only consider files with a modification date within the last X days.`,
 	// Hidden: true,
 	Args: cobra.MinimumNArgs(1),
-	Run: func(cmd *cobra.Command, args []string) {
+	Run: func(_ *cobra.Command, args []string) {
 		var count int
 		var total int
 		var per100start = time.Now()
@@ -55,7 +55,7 @@ The --recent flag will only consider files with a modification date within the l
 						logger.Log().Errorf("%s: %s", path, err.Error())
 						return nil
 					}
-					defer f.Close() // #nosec
+					defer func() { _ = f.Close() }()
 
 					body, err := io.ReadAll(f)
 					if err != nil {

cmd/readyz.go

@@ -28,7 +28,7 @@ status 1 if unhealthy.
 If running within Docker, it should automatically detect environment
 settings to determine the HTTP bind interface & port.
 `,
-	Run: func(cmd *cobra.Command, args []string) {
+	Run: func(_ *cobra.Command, _ []string) {
 		webroot := strings.TrimRight(path.Join("/", config.Webroot, "/"), "/") + "/"
 		proto := "http"
 		if useHTTPS {

cmd/reindex.go

@@ -18,7 +18,7 @@ var reindexCmd = &cobra.Command{
 If you have several thousand messages in your mailbox, then it is advised to shut down
 Mailpit while you reindex as this process will likely result in database locking issues.`,
 	Args: cobra.ExactArgs(1),
-	Run: func(cmd *cobra.Command, args []string) {
+	Run: func(_ *cobra.Command, args []string) {
 		config.Database = args[0]
 		config.MaxMessages = 0
 

cmd/root.go

@@ -9,6 +9,7 @@ import (
 	"github.com/axllent/mailpit/config"
 	"github.com/axllent/mailpit/internal/auth"
 	"github.com/axllent/mailpit/internal/logger"
+	"github.com/axllent/mailpit/internal/prometheus"
 	"github.com/axllent/mailpit/internal/smtpd"
 	"github.com/axllent/mailpit/internal/smtpd/chaos"
 	"github.com/axllent/mailpit/internal/storage"
@@ -39,6 +40,14 @@ Documentation:
 			os.Exit(1)
 		}
 
+		// Start Prometheus metrics if enabled
+		switch prometheus.GetMode() {
+		case "integrated":
+			prometheus.StartUpdater()
+		case "separate":
+			go prometheus.StartSeparateServer()
+		}
+
 		go server.Listen()
 
 		if err := smtpd.Listen(); err != nil {
@@ -58,14 +67,6 @@ func Execute() {
 	}
 }
 
-// SendmailExecute adds all child commands to the root command and sets flags appropriately.
-// This is called by main.main(). It only needs to happen once to the rootCmd.
-func SendmailExecute() {
-	args := []string{"mailpit", "sendmail"}
-
-	rootCmd.Run(sendmailCmd, args)
-}
-
 func init() {
 	// hide autocompletion
 	rootCmd.CompletionOptions.HiddenDefaultCmd = true
@@ -83,12 +84,15 @@ func init() {
 	initConfigFromEnv()
 
 	rootCmd.Flags().StringVarP(&config.Database, "database", "d", config.Database, "Database to store persistent data")
+	rootCmd.Flags().BoolVar(&config.DisableWAL, "disable-wal", config.DisableWAL, "Disable WAL for local database (allows NFS mounted DBs)")
+	rootCmd.Flags().BoolVar(&config.DisableVersionCheck, "disable-version-check", config.DisableVersionCheck, "Disable version update checking")
+	rootCmd.Flags().IntVar(&config.Compression, "compression", config.Compression, "Compression level to store raw messages (0-3)")
 	rootCmd.Flags().StringVar(&config.Label, "label", config.Label, "Optional label identify this Mailpit instance")
 	rootCmd.Flags().StringVar(&config.TenantID, "tenant-id", config.TenantID, "Database tenant ID to isolate data")
 	rootCmd.Flags().IntVarP(&config.MaxMessages, "max", "m", config.MaxMessages, "Max number of messages to store")
 	rootCmd.Flags().StringVar(&config.MaxAge, "max-age", config.MaxAge, "Max age of messages in either (h)ours or (d)ays (eg: 3d)")
 	rootCmd.Flags().BoolVar(&config.UseMessageDates, "use-message-dates", config.UseMessageDates, "Use message dates as the received dates")
-	rootCmd.Flags().BoolVar(&config.IgnoreDuplicateIDs, "ignore-duplicate-ids", config.IgnoreDuplicateIDs, "Ignore duplicate messages (by Message-Id)")
+	rootCmd.Flags().BoolVar(&config.IgnoreDuplicateIDs, "ignore-duplicate-ids", config.IgnoreDuplicateIDs, "Ignore duplicate messages (by Message-ID)")
 	rootCmd.Flags().StringVar(&logger.LogFile, "log-file", logger.LogFile, "Log output to file instead of stdout")
 	rootCmd.Flags().BoolVarP(&logger.QuietLogging, "quiet", "q", logger.QuietLogging, "Quiet logging (errors only)")
 	rootCmd.Flags().BoolVarP(&logger.VerboseLogging, "verbose", "v", logger.VerboseLogging, "Verbose logging")
@@ -103,6 +107,12 @@ func init() {
 	rootCmd.Flags().BoolVar(&config.BlockRemoteCSSAndFonts, "block-remote-css-and-fonts", config.BlockRemoteCSSAndFonts, "Block access to remote CSS & fonts")
 	rootCmd.Flags().StringVar(&config.EnableSpamAssassin, "enable-spamassassin", config.EnableSpamAssassin, "Enable integration with SpamAssassin")
 	rootCmd.Flags().BoolVar(&config.AllowUntrustedTLS, "allow-untrusted-tls", config.AllowUntrustedTLS, "Do not verify HTTPS certificates (link checker & screenshots)")
+	rootCmd.Flags().BoolVar(&config.DisableHTTPCompression, "disable-http-compression", config.DisableHTTPCompression, "Disable HTTP compression support (web UI & API)")
+	rootCmd.Flags().BoolVar(&config.HideDeleteAllButton, "hide-delete-all-button", config.HideDeleteAllButton, "Hide the \"Delete all\" button in the web UI")
+
+	// Send API
+	rootCmd.Flags().StringVar(&config.SendAPIAuthFile, "send-api-auth-file", config.SendAPIAuthFile, "A password file for Send API authentication")
+	rootCmd.Flags().BoolVar(&config.SendAPIAuthAcceptAny, "send-api-auth-accept-any", config.SendAPIAuthAcceptAny, "Accept any username and password for the Send API endpoint, including none")
 
 	// SMTP server
 	rootCmd.Flags().StringVarP(&config.SMTPListen, "smtp", "s", config.SMTPListen, "SMTP bind interface and port")
@@ -116,6 +126,7 @@ func init() {
 	rootCmd.Flags().BoolVar(&config.SMTPStrictRFCHeaders, "smtp-strict-rfc-headers", config.SMTPStrictRFCHeaders, "Return SMTP error if message headers contain <CR><CR><LF>")
 	rootCmd.Flags().IntVar(&config.SMTPMaxRecipients, "smtp-max-recipients", config.SMTPMaxRecipients, "Maximum SMTP recipients allowed")
 	rootCmd.Flags().StringVar(&config.SMTPAllowedRecipients, "smtp-allowed-recipients", config.SMTPAllowedRecipients, "Only allow SMTP recipients matching a regular expression (default allow all)")
+	rootCmd.Flags().BoolVar(&config.SMTPIgnoreRejectedRecipients, "smtp-ignore-rejected-recipients", config.SMTPIgnoreRejectedRecipients, "Ignore rejected SMTP recipients with 2xx response")
 	rootCmd.Flags().BoolVar(&smtpd.DisableReverseDNS, "smtp-disable-rdns", smtpd.DisableReverseDNS, "Disable SMTP reverse DNS lookups")
 
 	// SMTP relay
@@ -141,6 +152,10 @@ func init() {
 	rootCmd.Flags().StringVar(&config.TagsConfig, "tags-config", config.TagsConfig, "Load tags filters from yaml configuration file")
 	rootCmd.Flags().BoolVar(&tools.TagsTitleCase, "tags-title-case", tools.TagsTitleCase, "TitleCase new tags generated from plus-addresses and X-Tags")
 	rootCmd.Flags().StringVar(&config.TagsDisable, "tags-disable", config.TagsDisable, "Disable auto-tagging, comma separated (eg: plus-addresses,x-tags)")
+	rootCmd.Flags().BoolVar(&config.TagsUsername, "tags-username", config.TagsUsername, "Auto-tag messages with the authenticated username")
+
+	// Prometheus metrics
+	rootCmd.Flags().StringVar(&config.PrometheusListen, "enable-prometheus", config.PrometheusListen, "Enable Prometheus metrics: true|false|<ip:port> (eg:'0.0.0.0:9090')")
 
 	// Webhook
 	rootCmd.Flags().StringVar(&config.WebhookURL, "webhook-url", config.WebhookURL, "Send a webhook request for new messages")
@@ -181,6 +196,14 @@ func initConfigFromEnv() {
 		config.Database = os.Getenv("MP_DATABASE")
 	}
 
+	config.DisableWAL = getEnabledFromEnv("MP_DISABLE_WAL")
+
+	config.DisableVersionCheck = getEnabledFromEnv("MP_DISABLE_VERSION_CHECK")
+
+	if len(os.Getenv("MP_COMPRESSION")) > 0 {
+		config.Compression, _ = strconv.Atoi(os.Getenv("MP_COMPRESSION"))
+	}
+
 	config.TenantID = os.Getenv("MP_TENANT_ID")
 
 	config.Label = os.Getenv("MP_LABEL")
@@ -232,6 +255,21 @@ func initConfigFromEnv() {
 	if getEnabledFromEnv("MP_ALLOW_UNTRUSTED_TLS") {
 		config.AllowUntrustedTLS = true
 	}
+	if getEnabledFromEnv("MP_DISABLE_HTTP_COMPRESSION") {
+		config.DisableHTTPCompression = true
+	}
+	if getEnabledFromEnv("MP_HIDE_DELETE_ALL_BUTTON") {
+		config.HideDeleteAllButton = true
+	}
+
+	// Send API
+	config.SendAPIAuthFile = os.Getenv("MP_SEND_API_AUTH_FILE")
+	if err := auth.SetSendAPIAuth(os.Getenv("MP_SEND_API_AUTH")); err != nil {
+		logger.Log().Error(err.Error())
+	}
+	if getEnabledFromEnv("MP_SEND_API_AUTH_ACCEPT_ANY") {
+		config.SendAPIAuthAcceptAny = true
+	}
 
 	// SMTP server
 	if len(os.Getenv("MP_SMTP_BIND_ADDR")) > 0 {
@@ -264,6 +302,9 @@ func initConfigFromEnv() {
 	if len(os.Getenv("MP_SMTP_ALLOWED_RECIPIENTS")) > 0 {
 		config.SMTPAllowedRecipients = os.Getenv("MP_SMTP_ALLOWED_RECIPIENTS")
 	}
+	if getEnabledFromEnv("MP_SMTP_IGNORE_REJECTED_RECIPIENTS") {
+		config.SMTPIgnoreRejectedRecipients = true
+	}
 	if getEnabledFromEnv("MP_SMTP_DISABLE_RDNS") {
 		smtpd.DisableReverseDNS = true
 	}
@@ -280,6 +321,7 @@ func initConfigFromEnv() {
 		config.SMTPRelayConfig.Port, _ = strconv.Atoi(os.Getenv("MP_SMTP_RELAY_PORT"))
 	}
 	config.SMTPRelayConfig.STARTTLS = getEnabledFromEnv("MP_SMTP_RELAY_STARTTLS")
+	config.SMTPRelayConfig.TLS = getEnabledFromEnv("MP_SMTP_RELAY_TLS")
 	config.SMTPRelayConfig.AllowInsecure = getEnabledFromEnv("MP_SMTP_RELAY_ALLOW_INSECURE")
 	config.SMTPRelayConfig.Auth = os.Getenv("MP_SMTP_RELAY_AUTH")
 	config.SMTPRelayConfig.Username = os.Getenv("MP_SMTP_RELAY_USERNAME")
@@ -289,6 +331,8 @@ func initConfigFromEnv() {
 	config.SMTPRelayConfig.OverrideFrom = os.Getenv("MP_SMTP_RELAY_OVERRIDE_FROM")
 	config.SMTPRelayConfig.AllowedRecipients = os.Getenv("MP_SMTP_RELAY_ALLOWED_RECIPIENTS")
 	config.SMTPRelayConfig.BlockedRecipients = os.Getenv("MP_SMTP_RELAY_BLOCKED_RECIPIENTS")
+	config.SMTPRelayConfig.PreserveMessageIDs = getEnabledFromEnv("MP_SMTP_RELAY_PRESERVE_MESSAGE_IDS")
+	config.SMTPRelayConfig.ForwardSMTPErrors = getEnabledFromEnv("MP_SMTP_RELAY_FWD_SMTP_ERRORS")
 
 	// SMTP forwarding
 	config.SMTPForwardConfigFile = os.Getenv("MP_SMTP_FORWARD_CONFIG")
@@ -298,6 +342,7 @@ func initConfigFromEnv() {
 		config.SMTPForwardConfig.Port, _ = strconv.Atoi(os.Getenv("MP_SMTP_FORWARD_PORT"))
 	}
 	config.SMTPForwardConfig.STARTTLS = getEnabledFromEnv("MP_SMTP_FORWARD_STARTTLS")
+	config.SMTPForwardConfig.TLS = getEnabledFromEnv("MP_SMTP_FORWARD_TLS")
 	config.SMTPForwardConfig.AllowInsecure = getEnabledFromEnv("MP_SMTP_FORWARD_ALLOW_INSECURE")
 	config.SMTPForwardConfig.Auth = os.Getenv("MP_SMTP_FORWARD_AUTH")
 	config.SMTPForwardConfig.Username = os.Getenv("MP_SMTP_FORWARD_USERNAME")
@@ -306,6 +351,7 @@ func initConfigFromEnv() {
 	config.SMTPForwardConfig.ReturnPath = os.Getenv("MP_SMTP_FORWARD_RETURN_PATH")
 	config.SMTPForwardConfig.OverrideFrom = os.Getenv("MP_SMTP_FORWARD_OVERRIDE_FROM")
 	config.SMTPForwardConfig.To = os.Getenv("MP_SMTP_FORWARD_TO")
+	config.SMTPForwardConfig.ForwardSMTPErrors = getEnabledFromEnv("MP_SMTP_FORWARD_FWD_SMTP_ERRORS")
 
 	// Chaos
 	chaos.Enabled = getEnabledFromEnv("MP_ENABLE_CHAOS")
@@ -327,6 +373,12 @@ func initConfigFromEnv() {
 	config.TagsConfig = os.Getenv("MP_TAGS_CONFIG")
 	tools.TagsTitleCase = getEnabledFromEnv("MP_TAGS_TITLE_CASE")
 	config.TagsDisable = os.Getenv("MP_TAGS_DISABLE")
+	config.TagsUsername = getEnabledFromEnv("MP_TAGS_USERNAME")
+
+	// Prometheus metrics
+	if len(os.Getenv("MP_ENABLE_PROMETHEUS")) > 0 {
+		config.PrometheusListen = os.Getenv("MP_ENABLE_PROMETHEUS")
+	}
 
 	// Webhook
 	if len(os.Getenv("MP_WEBHOOK_URL")) > 0 {
@@ -344,9 +396,9 @@ func initConfigFromEnv() {
 func initDeprecatedConfigFromEnv() {
 	// deprecated 2024/04/12 - but will not be removed to maintain backwards compatibility
 	if len(os.Getenv("MP_DATA_FILE")) > 0 {
+		logger.Log().Warn("ENV MP_DATA_FILE has been deprecated, use MP_DATABASE")
 		config.Database = os.Getenv("MP_DATA_FILE")
 	}
-
 	// deprecated 2023/03/12
 	if len(os.Getenv("MP_UI_SSL_CERT")) > 0 {
 		logger.Log().Warn("ENV MP_UI_SSL_CERT has been deprecated, use MP_UI_TLS_CERT")

cmd/version.go

@@ -6,7 +6,6 @@ import (
 	"runtime"
 
 	"github.com/axllent/mailpit/config"
-	"github.com/axllent/mailpit/internal/updater"
 	"github.com/spf13/cobra"
 )
 
@@ -15,29 +14,44 @@ var versionCmd = &cobra.Command{
 	Use:   "version",
 	Short: "Display the current version & update information",
 	Long:  `Display the current version & update information (if available).`,
-	RunE: func(cmd *cobra.Command, args []string) error {
-
-		updater.AllowPrereleases = true
-
+	Run: func(cmd *cobra.Command, _ []string) {
 		update, _ := cmd.Flags().GetBool("update")
+		noReleaseCheck, _ := cmd.Flags().GetBool("no-release-check")
 
 		if update {
-			return updateApp()
+			// Update the application
+			rel, err := config.GHRUConfig.SelfUpdate()
+			if err != nil {
+				fmt.Printf("Error updating: %s\n", err)
+				os.Exit(1)
+			}
+
+			fmt.Printf("Updated %s to version %s\n", os.Args[0], rel.Tag)
+			os.Exit(0)
 		}
 
 		fmt.Printf("%s %s compiled with %s on %s/%s\n",
 			os.Args[0], config.Version, runtime.Version(), runtime.GOOS, runtime.GOARCH)
 
-		latest, _, _, err := updater.GithubLatest(config.Repo, config.RepoBinaryName)
-		if err == nil && updater.GreaterThan(latest, config.Version) {
+		if !noReleaseCheck {
+			release, err := config.GHRUConfig.Latest()
+			if err != nil {
+				fmt.Printf("Error checking for latest release: %s\n", err)
+				os.Exit(1)
+			}
+
+			// The latest version is the same version
+			if release.Tag == config.Version {
+				os.Exit(0)
+			}
+
+			// A newer release is available
 			fmt.Printf(
 				"\nUpdate available: %s\nRun `%s version -u` to update (requires read/write access to install directory).\n",
-				latest,
+				release.Tag,
 				os.Args[0],
 			)
 		}
-
-		return nil
 	},
 }
 
@@ -46,14 +60,6 @@ func init() {
 
 	versionCmd.Flags().
 		BoolP("update", "u", false, "update to latest version")
-}
-
-func updateApp() error {
-	rel, err := updater.GithubUpdate(config.Repo, config.RepoBinaryName, config.Version)
-	if err != nil {
-		return err
-	}
-
-	fmt.Printf("Updated %s to version %s\n", os.Args[0], rel)
-	return nil
+	versionCmd.Flags().
+		Bool("no-release-check", false, "do not check online for the latest release version")
 }

config/config.go

@@ -11,14 +11,28 @@ import (
 	"regexp"
 	"strings"
 
+	"github.com/axllent/ghru/v2"
 	"github.com/axllent/mailpit/internal/auth"
 	"github.com/axllent/mailpit/internal/logger"
 	"github.com/axllent/mailpit/internal/smtpd/chaos"
+	"github.com/axllent/mailpit/internal/snakeoil"
 	"github.com/axllent/mailpit/internal/spamassassin"
 	"github.com/axllent/mailpit/internal/tools"
 )
 
 var (
+	// Version is the Mailpit version, updated with every release
+	Version = "dev"
+
+	// GHRUConfig is the configuration for the GitHub Release Updater
+	// used to check for updates and self-update
+	GHRUConfig = ghru.Config{
+		Repo:           "axllent/mailpit",
+		ArchiveName:    "mailpit-{{.OS}}-{{.Arch}}",
+		BinaryName:     "mailpit",
+		CurrentVersion: Version,
+	}
+
 	// SMTPListen to listen on <interface>:<port>
 	SMTPListen = "[::]:1025"
 
@@ -28,6 +42,14 @@ var (
 	// Database for mail (optional)
 	Database string
 
+	// DisableWAL will disable Write-Ahead Logging in SQLite
+	// @see https://sqlite.org/wal.html
+	DisableWAL bool
+
+	// Compression is the compression level used to store raw messages in the database:
+	// 0 = off, 1 = fastest (default), 2 = standard, 3 = best compression
+	Compression = 1
+
 	// TenantID is an optional prefix to be applied to all database tables,
 	// allowing multiple isolated instances of Mailpit to share a database.
 	TenantID string
@@ -61,6 +83,15 @@ var (
 	// Webroot to define the base path for the UI and API
 	Webroot = "/"
 
+	// DisableHTTPCompression will explicitly disable HTTP compression in the web UI and API
+	DisableHTTPCompression bool
+
+	// SendAPIAuthFile for Send API authentication
+	SendAPIAuthFile string
+
+	// SendAPIAuthAcceptAny accepts any username/password for the send API endpoint, including none
+	SendAPIAuthAcceptAny bool
+
 	// SMTPTLSCert file
 	SMTPTLSCert string
 
@@ -100,7 +131,7 @@ var (
 	CLITagsArg string
 
 	// ValidTagRegexp represents a valid tag
-	ValidTagRegexp = regexp.MustCompile(`^([a-zA-Z0-9\-\ \_\.]){1,}$`)
+	ValidTagRegexp = regexp.MustCompile(`^([a-zA-Z0-9\-\ \_\.@]){1,100}$`)
 
 	// TagsConfig is a yaml file to pre-load tags
 	TagsConfig string
@@ -112,6 +143,9 @@ var (
 	// including x-tags & plus-addresses
 	TagsDisable string
 
+	// TagsUsername enables auto-tagging messages with the authenticated username
+	TagsUsername bool
+
 	// SMTPRelayConfigFile to parse a yaml file and store config of the relay SMTP server
 	SMTPRelayConfigFile string
 
@@ -147,6 +181,9 @@ var (
 	// SMTPAllowedRecipientsRegexp is the compiled version of SMTPAllowedRecipients
 	SMTPAllowedRecipientsRegexp *regexp.Regexp
 
+	// SMTPIgnoreRejectedRecipients if true, will accept emails to rejected recipients with 2xx response but silently drop them
+	SMTPIgnoreRejectedRecipients bool
+
 	// POP3Listen address - if set then Mailpit will start the POP3 server and listen on this address
 	POP3Listen = "[::]:1110"
 
@@ -162,6 +199,9 @@ var (
 	// EnableSpamAssassin must be either <host>:<port> or "postmark"
 	EnableSpamAssassin string
 
+	// HideDeleteAllButton hides the delete all button in the web UI
+	HideDeleteAllButton bool
+
 	// WebhookURL for calling
 	WebhookURL string
 
@@ -171,14 +211,9 @@ var (
 	// AllowUntrustedTLS allows untrusted HTTPS connections link checking & screenshot generation
 	AllowUntrustedTLS bool
 
-	// Version is the default application version, updated on release
-	Version = "dev"
-
-	// Repo on Github for updater
-	Repo = "axllent/mailpit"
-
-	// RepoBinaryName on Github for updater
-	RepoBinaryName = "mailpit"
+	// PrometheusListen address for Prometheus metrics server
+	// Empty = disabled, true= use existing web server, address = separate server
+	PrometheusListen string
 
 	// ChaosTriggers are parsed and set in the chaos module
 	ChaosTriggers string
@@ -186,6 +221,9 @@ var (
 	// DisableHTMLCheck DEPRECATED 2024/04/13 - kept here to display console warning only
 	DisableHTMLCheck = false
 
+	// DisableVersionCheck disables version checking
+	DisableVersionCheck bool
+
 	// DemoMode disables SMTP relay, link checking & HTTP send functionality
 	DemoMode = false
 )
@@ -198,10 +236,11 @@ type autoTag struct {
 
 // SMTPRelayConfigStruct struct for parsing yaml & storing variables
 type SMTPRelayConfigStruct struct {
-	Host                    string         `yaml:"host"`
-	Port                    int            `yaml:"port"`
-	STARTTLS                bool           `yaml:"starttls"`
-	AllowInsecure           bool           `yaml:"allow-insecure"`
+	Host                    string         `yaml:"host"`               // SMTP host
+	Port                    int            `yaml:"port"`               // SMTP port
+	STARTTLS                bool           `yaml:"starttls"`           // whether to use STARTTLS
+	TLS                     bool           `yaml:"tls"`                // whether to use TLS
+	AllowInsecure           bool           `yaml:"allow-insecure"`     // allow insecure authentication, ignore TLS validation
 	Auth                    string         `yaml:"auth"`               // none, plain, login, cram-md5
 	Username                string         `yaml:"username"`           // plain & cram-md5
 	Password                string         `yaml:"password"`           // plain
@@ -212,6 +251,8 @@ type SMTPRelayConfigStruct struct {
 	AllowedRecipientsRegexp *regexp.Regexp // compiled regexp using AllowedRecipients
 	BlockedRecipients       string         `yaml:"blocked-recipients"` // regex, if set prevents relating to these addresses
 	BlockedRecipientsRegexp *regexp.Regexp // compiled regexp using BlockedRecipients
+	PreserveMessageIDs      bool           `yaml:"preserve-message-ids"` // preserve the original Message-ID when relaying
+	ForwardSMTPErrors       bool           `yaml:"forward-smtp-errors"`  // whether to log smtp-errors or forward them to upstream-client
 
 	// DEPRECATED 2024/03/12
 	RecipientAllowlist string `yaml:"recipient-allowlist"`
@@ -219,17 +260,19 @@ type SMTPRelayConfigStruct struct {
 
 // SMTPForwardConfigStruct struct for parsing yaml & storing variables
 type SMTPForwardConfigStruct struct {
-	To            string `yaml:"to"`             // comma-separated list of email addresses
-	Host          string `yaml:"host"`           // SMTP host
-	Port          int    `yaml:"port"`           // SMTP port
-	STARTTLS      bool   `yaml:"starttls"`       // whether to use STARTTLS
-	AllowInsecure bool   `yaml:"allow-insecure"` // allow insecure authentication
-	Auth          string `yaml:"auth"`           // none, plain, login, cram-md5
-	Username      string `yaml:"username"`       // plain & cram-md5
-	Password      string `yaml:"password"`       // plain
-	Secret        string `yaml:"secret"`         // cram-md5
-	ReturnPath    string `yaml:"return-path"`    // allow overriding the bounce address
-	OverrideFrom  string `yaml:"override-from"`  // allow overriding of the from address
+	To                string `yaml:"to"`                  // comma-separated list of email addresses
+	Host              string `yaml:"host"`                // SMTP host
+	Port              int    `yaml:"port"`                // SMTP port
+	STARTTLS          bool   `yaml:"starttls"`            // whether to use STARTTLS
+	TLS               bool   `yaml:"tls"`                 // whether to use TLS
+	AllowInsecure     bool   `yaml:"allow-insecure"`      // allow insecure authentication, ignore TLS validation
+	Auth              string `yaml:"auth"`                // none, plain, login, cram-md5
+	Username          string `yaml:"username"`            // plain & cram-md5
+	Password          string `yaml:"password"`            // plain
+	Secret            string `yaml:"secret"`              // cram-md5
+	ReturnPath        string `yaml:"return-path"`         // allow overriding the bounce address
+	OverrideFrom      string `yaml:"override-from"`       // allow overriding of the from address
+	ForwardSMTPErrors bool   `yaml:"forward-smtp-errors"` // whether to log smtp-errors or forward them to upstream-client
 }
 
 // VerifyConfig wil do some basic checking
@@ -242,7 +285,8 @@ func VerifyConfig() error {
 	// The default Content Security Policy is updates on every application page load to replace script-src 'self'
 	// with a random nonce ID to prevent XSS. This applies to the Mailpit app & API.
 	// See server.middleWareFunc()
-	ContentSecurityPolicy = fmt.Sprintf("default-src 'self'; script-src 'self'; style-src %s 'unsafe-inline'; frame-src 'self'; img-src * data: blob:; font-src %s data:; media-src 'self'; connect-src 'self' ws: wss:; object-src 'none'; base-uri 'self';",
+	ContentSecurityPolicy = fmt.Sprintf(
+		"default-src 'self'; script-src 'self'; style-src %s 'unsafe-inline'; frame-src 'self'; img-src * data: blob:; font-src %s data:; media-src 'self'; connect-src 'self' ws: wss:; object-src 'none'; base-uri 'self';",
 		cssFontRestriction, cssFontRestriction,
 	)
 
@@ -250,6 +294,10 @@ func VerifyConfig() error {
 		Database = filepath.Join(Database, "mailpit.db")
 	}
 
+	if Compression < 0 || Compression > 3 {
+		return errors.New("[db] compression level must be between 0 and 3")
+	}
+
 	Label = tools.Normalize(Label)
 
 	if err := parseMaxAge(); err != nil {
@@ -269,6 +317,7 @@ func VerifyConfig() error {
 		return errors.New("[ui] HTTP bind should be in the format of <ip>:<port>")
 	}
 
+	// Web UI & API
 	if UIAuthFile != "" {
 		UIAuthFile = filepath.Clean(UIAuthFile)
 
@@ -291,8 +340,19 @@ func VerifyConfig() error {
 	}
 
 	if UITLSCert != "" {
-		UITLSCert = filepath.Clean(UITLSCert)
-		UITLSKey = filepath.Clean(UITLSKey)
+		if strings.HasPrefix(UITLSCert, "sans:") {
+			// generate a self-signed certificate
+			UITLSCert = snakeoil.Public(UITLSCert)
+		} else {
+			UITLSCert = filepath.Clean(UITLSCert)
+		}
+
+		if strings.HasPrefix(UITLSKey, "sans:") {
+			// generate a self-signed key
+			UITLSKey = snakeoil.Private(UITLSKey)
+		} else {
+			UITLSKey = filepath.Clean(UITLSKey)
+		}
 
 		if !isFile(UITLSCert) {
 			return fmt.Errorf("[ui] TLS certificate not found or readable: %s", UITLSCert)
@@ -303,13 +363,67 @@ func VerifyConfig() error {
 		}
 	}
 
+	// Send API
+	if SendAPIAuthFile != "" {
+		SendAPIAuthFile = filepath.Clean(SendAPIAuthFile)
+
+		if !isFile(SendAPIAuthFile) {
+			return fmt.Errorf("[send-api] password file not found or readable: %s", SendAPIAuthFile)
+		}
+
+		b, err := os.ReadFile(SendAPIAuthFile)
+		if err != nil {
+			return err
+		}
+
+		if err := auth.SetSendAPIAuth(string(b)); err != nil {
+			return err
+		}
+
+		logger.Log().Info("[send-api] enabling basic authentication")
+	}
+
+	if auth.SendAPICredentials != nil && SendAPIAuthAcceptAny {
+		return errors.New("[send-api] authentication cannot use both credentials and --send-api-auth-accept-any")
+	}
+
+	if SendAPIAuthAcceptAny && auth.UICredentials != nil {
+		logger.Log().Info("[send-api] disabling authentication")
+	}
+
+	// Prometheus configuration validation
+	if PrometheusListen != "" {
+		mode := strings.ToLower(strings.TrimSpace(PrometheusListen))
+		if mode != "true" && mode != "false" {
+			// Validate as address for separate server mode
+			_, err := net.ResolveTCPAddr("tcp", PrometheusListen)
+			if err != nil {
+				return fmt.Errorf("[prometheus] %s", err.Error())
+			}
+		} else if mode == "true" {
+			logger.Log().Info("[prometheus] enabling metrics")
+		}
+	}
+
+	// SMTP server
 	if SMTPTLSCert != "" && SMTPTLSKey == "" || SMTPTLSCert == "" && SMTPTLSKey != "" {
-		return errors.New("[smtp] You must provide both an SMTP TLS certificate and a key")
+		return errors.New("[smtp] you must provide both an SMTP TLS certificate and a key")
 	}
 
 	if SMTPTLSCert != "" {
-		SMTPTLSCert = filepath.Clean(SMTPTLSCert)
-		SMTPTLSKey = filepath.Clean(SMTPTLSKey)
+		if strings.HasPrefix(SMTPTLSCert, "sans:") {
+			// generate a self-signed certificate
+			SMTPTLSCert = snakeoil.Public(SMTPTLSCert)
+		} else {
+			SMTPTLSCert = filepath.Clean(SMTPTLSCert)
+		}
+
+		if strings.HasPrefix(SMTPTLSKey, "sans:") {
+			// generate a self-signed key
+			SMTPTLSKey = snakeoil.Private(SMTPTLSKey)
+		} else {
+			SMTPTLSKey = filepath.Clean(SMTPTLSKey)
+		}
 
 		if !isFile(SMTPTLSCert) {
 			return fmt.Errorf("[smtp] TLS certificate not found or readable: %s", SMTPTLSCert)
@@ -377,8 +491,18 @@ func VerifyConfig() error {
 
 	// POP3 server
 	if POP3TLSCert != "" {
-		POP3TLSCert = filepath.Clean(POP3TLSCert)
-		POP3TLSKey = filepath.Clean(POP3TLSKey)
+		if strings.HasPrefix(POP3TLSCert, "sans:") {
+			// generate a self-signed certificate
+			POP3TLSCert = snakeoil.Public(POP3TLSCert)
+		} else {
+			POP3TLSCert = filepath.Clean(POP3TLSCert)
+		}
+		if strings.HasPrefix(POP3TLSKey, "sans:") {
+			// generate a self-signed key
+			POP3TLSKey = snakeoil.Private(POP3TLSKey)
+		} else {
+			POP3TLSKey = filepath.Clean(POP3TLSKey)
+		}
 
 		if !isFile(POP3TLSCert) {
 			return fmt.Errorf("[pop3] TLS certificate not found or readable: %s", POP3TLSCert)
@@ -389,7 +513,7 @@ func VerifyConfig() error {
 		}
 	}
 	if POP3TLSCert != "" && POP3TLSKey == "" || POP3TLSCert == "" && POP3TLSKey != "" {
-		return errors.New("[pop3] You must provide both a POP3 TLS certificate and a key")
+		return errors.New("[pop3] you must provide both a POP3 TLS certificate and a key")
 	}
 	if POP3Listen != "" {
 		_, err := net.ResolveTCPAddr("tcp", POP3Listen)
@@ -463,6 +587,14 @@ func VerifyConfig() error {
 		logger.Log().Infof("[smtp] only allowing recipients matching regexp: %s", SMTPAllowedRecipients)
 	}
 
+	if SMTPIgnoreRejectedRecipients {
+		if SMTPAllowedRecipientsRegexp == nil {
+			logger.Log().Warn("[smtp] ignoring rejected recipients has no effect without setting smtp-allowed-recipients")
+		} else {
+			logger.Log().Info("[smtp] ignoring rejected recipients")
+		}
+	}
+
 	if err := parseRelayConfig(SMTPRelayConfigFile); err != nil {
 		return err
 	}
@@ -486,8 +618,10 @@ func VerifyConfig() error {
 			}
 
 			SMTPRelayMatchingRegexp = re
-			logger.Log().Infof("[relay] auto-relaying new messages to recipients matching \"%s\" via %s:%d",
-				SMTPRelayMatching, SMTPRelayConfig.Host, SMTPRelayConfig.Port)
+			logger.Log().Infof(
+				"[relay] auto-relaying new messages to recipients matching \"%s\" via %s:%d",
+				SMTPRelayMatching, SMTPRelayConfig.Host, SMTPRelayConfig.Port,
+			)
 		}
 	}
 

config/tags.go

@@ -8,7 +8,7 @@ import (
 
 	"github.com/axllent/mailpit/internal/logger"
 	"github.com/axllent/mailpit/internal/tools"
-	"gopkg.in/yaml.v3"
+	"github.com/goccy/go-yaml"
 )
 
 var (

config/utils.go

@@ -13,7 +13,7 @@ import (
 // IsFile returns whether a file exists and is readable
 func isFile(path string) bool {
 	f, err := os.Open(filepath.Clean(path))
-	defer f.Close()
+	defer func() { _ = f.Close() }()
 	return err == nil
 }
 

config/validators.go

@@ -12,7 +12,7 @@ import (
 
 	"github.com/axllent/mailpit/internal/logger"
 	"github.com/axllent/mailpit/internal/smtpd/chaos"
-	"gopkg.in/yaml.v3"
+	"github.com/goccy/go-yaml"
 )
 
 // Parse the --max-age value (if set)
@@ -145,6 +145,10 @@ func validateRelayConfig() error {
 		SMTPRelayConfig.OverrideFrom = m.Address
 	}
 
+	if SMTPRelayConfig.STARTTLS && SMTPRelayConfig.TLS {
+		return fmt.Errorf("[relay] TLS & STARTTLS cannot be required together")
+	}
+
 	ReleaseEnabled = true
 
 	logger.Log().Infof("[relay] enabling message relaying via %s:%d", SMTPRelayConfig.Host, SMTPRelayConfig.Port)
@@ -243,6 +247,10 @@ func validateForwardConfig() error {
 		SMTPForwardConfig.OverrideFrom = m.Address
 	}
 
+	if SMTPForwardConfig.STARTTLS && SMTPForwardConfig.TLS {
+		return fmt.Errorf("[forward] TLS & STARTTLS cannot be required together")
+	}
+
 	logger.Log().Infof("[forward] enabling message forwarding to %s via %s:%d", SMTPForwardConfig.To, SMTPForwardConfig.Host, SMTPForwardConfig.Port)
 
 	return nil

esbuild.config.mjs

@@ -1,44 +1,39 @@
-import * as esbuild from 'esbuild'
-import pluginVue from 'esbuild-plugin-vue-next'
-import { sassPlugin } from 'esbuild-sass-plugin'
+import * as esbuild from "esbuild";
+import pluginVue from "esbuild-plugin-vue-next";
+import { sassPlugin } from "esbuild-sass-plugin";
 
-const doWatch = process.env.WATCH == 'true' ? true : false;
-const doMinify = process.env.MINIFY == 'true' ? true : false;
+const doWatch = process.env.WATCH === "true";
+const doMinify = process.env.MINIFY === "true";
 
-const ctx = await esbuild.context(
-    {
-        entryPoints: [
-            "server/ui-src/app.js",
-            "server/ui-src/docs.js"
-        ],
-        bundle: true,
-        minify: doMinify,
-        sourcemap: false,
-        define: {
-            '__VUE_OPTIONS_API__': 'true',
-            '__VUE_PROD_DEVTOOLS__': 'false',
-            '__VUE_PROD_HYDRATION_MISMATCH_DETAILS__': 'false',
-        },
-        outdir: "server/ui/dist/",
-        plugins: [
-            pluginVue(),
-            sassPlugin({
-                silenceDeprecations: ['import'],
-                quietDeps: true,
-            })
-        ],
-        loader: {
-            ".svg": "file",
-            ".woff": "file",
-            ".woff2": "file",
-        },
-        logLevel: "info"
-    }
-)
+const ctx = await esbuild.context({
+	entryPoints: ["server/ui-src/app.js", "server/ui-src/docs.js"],
+	bundle: true,
+	minify: doMinify,
+	sourcemap: false,
+	define: {
+		__VUE_OPTIONS_API__: "true",
+		__VUE_PROD_DEVTOOLS__: "false",
+		__VUE_PROD_HYDRATION_MISMATCH_DETAILS__: "false",
+	},
+	outdir: "server/ui/dist/",
+	plugins: [
+		pluginVue(),
+		sassPlugin({
+			silenceDeprecations: ["import"],
+			quietDeps: true,
+		}),
+	],
+	loader: {
+		".svg": "file",
+		".woff": "file",
+		".woff2": "file",
+	},
+	logLevel: "info",
+});
 
 if (doWatch) {
-    await ctx.watch()
+	await ctx.watch();
 } else {
-    await ctx.rebuild()
-    ctx.dispose()
+	await ctx.rebuild();
+	ctx.dispose();
 }

eslint.config.js

@@ -0,0 +1,76 @@
+import eslintConfigPrettier from "eslint-config-prettier/flat";
+import globals from "globals";
+import { includeIgnoreFile } from "@eslint/compat";
+import js from "@eslint/js";
+import vue from "eslint-plugin-vue";
+import { fileURLToPath } from "node:url";
+
+const gitignorePath = fileURLToPath(new URL(".gitignore", import.meta.url));
+
+export default [
+	/* Use .gitignore to prevent linting of irrelevant files */
+	includeIgnoreFile(gitignorePath, ".gitignore"),
+
+	/* ESLint's recommended rules */
+	{
+		files: ["**/*.js", "**/*.vue"],
+		languageOptions: { globals: { ...globals.browser, ...globals.node } },
+		rules: js.configs.recommended.rules,
+	},
+
+	/* Vue-specific rules */
+	...vue.configs["flat/recommended"],
+
+	/* Prettier is responsible for formatting, so we disable conflicting rules */
+	eslintConfigPrettier,
+
+	/* Our custom rules */
+	{
+		rules: {
+			/* Always use arrow functions for tidiness and consistency */
+			"prefer-arrow-callback": "error",
+
+			/* Always use camelCase for variable names */
+			camelcase: [
+				"error",
+				{
+					ignoreDestructuring: false,
+					ignoreGlobals: true,
+					ignoreImports: false,
+					properties: "never",
+				},
+			],
+
+			/* The default case in switch statements must always be last */
+			"default-case-last": "error",
+
+			/* Always use dot notation where possible (e.g. `obj.val` over `obj['val']`) */
+			"dot-notation": "error",
+
+			/* Always use `===` and `!==` for comparisons unless unambiguous */
+			eqeqeq: ["error", "smart"],
+
+			/* Never use `eval()` as it violates our CSP and can lead to security issues */
+			"no-eval": "error",
+			"no-implied-eval": "error",
+
+			/* Prevents accidental use of template literals in plain strings, e.g. "my ${var}" */
+			"no-template-curly-in-string": "error",
+
+			/* Avoid unnecessary ternary operators */
+			"no-unneeded-ternary": "error",
+
+			/* Avoid unused expressions that have no purpose */
+			"no-unused-expressions": "error",
+
+			/* Always use `const` or `let` to make scope behaviour clear */
+			"no-var": "error",
+
+			/* Always use shorthand syntax for objects where possible, e.g. { a, b() { } } */
+			"object-shorthand": "error",
+
+			/* Always use `const` for variables that are never reassigned */
+			"prefer-const": "error",
+		},
+	},
+];

go.mod

@@ -1,63 +1,81 @@
 module github.com/axllent/mailpit
 
-go 1.23
-
-toolchain go1.23.2
+go 1.24.3
 
 require (
-	github.com/PuerkitoBio/goquery v1.10.1
+	github.com/PuerkitoBio/goquery v1.11.0
 	github.com/araddon/dateparse v0.0.0-20210429162001-6b43995a97de
-	github.com/axllent/semver v0.0.1
-	github.com/gomarkdown/markdown v0.0.0-20250207164621-7a1f277a159e
+	github.com/axllent/ghru/v2 v2.0.2
+	github.com/axllent/semver v1.0.0
+	github.com/goccy/go-yaml v1.19.2
+	github.com/gomarkdown/markdown v0.0.0-20250810172220-2e2c11897d1a
 	github.com/gorilla/mux v1.8.1
 	github.com/gorilla/websocket v1.5.3
-	github.com/jhillyerd/enmime v1.3.0
-	github.com/klauspost/compress v1.17.11
-	github.com/kovidgoyal/imaging v1.6.3
+	github.com/jhillyerd/enmime/v2 v2.2.0
+	github.com/klauspost/compress v1.18.3
+	github.com/kovidgoyal/imaging v1.8.19
 	github.com/leporo/sqlf v1.4.0
 	github.com/lithammer/shortuuid/v4 v4.2.0
 	github.com/mneis/go-telnet v0.0.0-20221017141824-6f643e477c62
-	github.com/rqlite/gorqlite v0.0.0-20250128004930-114c7828b55a
-	github.com/sirupsen/logrus v1.9.3
-	github.com/spf13/cobra v1.8.1
-	github.com/spf13/pflag v1.0.6
-	github.com/tg123/go-htpasswd v1.2.3
-	github.com/vanng822/go-premailer v1.23.0
-	golang.org/x/net v0.34.0
-	golang.org/x/text v0.22.0
-	golang.org/x/time v0.10.0
-	gopkg.in/yaml.v3 v3.0.1
-	modernc.org/sqlite v1.34.5
+	github.com/pkg/errors v0.9.1
+	github.com/prometheus/client_golang v1.23.2
+	github.com/rqlite/gorqlite v0.0.0-20250609141355-ac86a4a1c9a8
+	github.com/sirupsen/logrus v1.9.4
+	github.com/spf13/cobra v1.10.2
+	github.com/spf13/pflag v1.0.10
+	github.com/tg123/go-htpasswd v1.2.4
+	github.com/vanng822/go-premailer v1.30.0
+	golang.org/x/crypto v0.47.0
+	golang.org/x/net v0.49.0
+	golang.org/x/text v0.33.0
+	golang.org/x/time v0.14.0
+	modernc.org/sqlite v1.44.1
 )
 
 require (
 	github.com/GehirnInc/crypt v0.0.0-20230320061759-8cc1b52080c5 // indirect
 	github.com/andybalholm/cascadia v1.3.3 // indirect
+	github.com/beorn7/perks v1.0.1 // indirect
 	github.com/cention-sany/utf7 v0.0.0-20170124080048-26cad61bd60a // indirect
+	github.com/cespare/xxhash/v2 v2.3.0 // indirect
+	github.com/clipperhouse/displaywidth v0.7.0 // indirect
+	github.com/clipperhouse/stringish v0.1.1 // indirect
+	github.com/clipperhouse/uax29/v2 v2.3.0 // indirect
 	github.com/dustin/go-humanize v1.0.1 // indirect
+	github.com/fatih/color v1.18.0 // indirect
 	github.com/gogs/chardet v0.0.0-20211120154057-b7413eaefb8f // indirect
 	github.com/google/uuid v1.6.0 // indirect
 	github.com/gorilla/css v1.0.1 // indirect
+	github.com/inbucket/html2text v1.0.0 // indirect
 	github.com/inconshreveable/mousetrap v1.1.0 // indirect
-	github.com/jaytaylor/html2text v0.0.0-20230321000545-74c2419ad056 // indirect
-	github.com/kr/pretty v0.3.0 // indirect
+	github.com/kovidgoyal/go-parallel v1.1.1 // indirect
+	github.com/kovidgoyal/go-shm v1.0.0 // indirect
+	github.com/kr/text v0.2.0 // indirect
+	github.com/mattn/go-colorable v0.1.14 // indirect
 	github.com/mattn/go-isatty v0.0.20 // indirect
-	github.com/mattn/go-runewidth v0.0.16 // indirect
-	github.com/ncruces/go-strftime v0.1.9 // indirect
-	github.com/olekukonko/tablewriter v0.0.5 // indirect
-	github.com/pkg/errors v0.9.1 // indirect
+	github.com/mattn/go-runewidth v0.0.19 // indirect
+	github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
+	github.com/ncruces/go-strftime v1.0.0 // indirect
+	github.com/olekukonko/cat v0.0.0-20250911104152-50322a0618f6 // indirect
+	github.com/olekukonko/errors v1.1.0 // indirect
+	github.com/olekukonko/ll v0.1.4-0.20260115111900-9e59c2286df0 // indirect
+	github.com/olekukonko/tablewriter v1.1.3 // indirect
+	github.com/prometheus/client_model v0.6.2 // indirect
+	github.com/prometheus/common v0.67.5 // indirect
+	github.com/prometheus/procfs v0.19.2 // indirect
 	github.com/reiver/go-oi v1.0.0 // indirect
 	github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec // indirect
-	github.com/rivo/uniseg v0.4.7 // indirect
+	github.com/rwcarlsen/goexif v0.0.0-20190401172101-9e8deecbddbd // indirect
 	github.com/ssor/bom v0.0.0-20170718123548-6386211fdfcf // indirect
 	github.com/valyala/bytebufferpool v1.0.0 // indirect
 	github.com/vanng822/css v1.0.1 // indirect
-	golang.org/x/crypto v0.33.0 // indirect
-	golang.org/x/exp v0.0.0-20250207012021-f9890c6ad9f3 // indirect
-	golang.org/x/image v0.24.0 // indirect
-	golang.org/x/sys v0.30.0 // indirect
-	gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 // indirect
-	modernc.org/libc v1.61.12 // indirect
+	go.yaml.in/yaml/v2 v2.4.3 // indirect
+	golang.org/x/exp v0.0.0-20260112195511-716be5621a96 // indirect
+	golang.org/x/image v0.35.0 // indirect
+	golang.org/x/mod v0.32.0 // indirect
+	golang.org/x/sys v0.40.0 // indirect
+	google.golang.org/protobuf v1.36.11 // indirect
+	modernc.org/libc v1.67.6 // indirect
 	modernc.org/mathutil v1.7.1 // indirect
-	modernc.org/memory v1.8.2 // indirect
+	modernc.org/memory v1.11.0 // indirect
 )

go.sum

@@ -1,34 +1,49 @@
 github.com/GehirnInc/crypt v0.0.0-20230320061759-8cc1b52080c5 h1:IEjq88XO4PuBDcvmjQJcQGg+w+UaafSy8G5Kcb5tBhI=
 github.com/GehirnInc/crypt v0.0.0-20230320061759-8cc1b52080c5/go.mod h1:exZ0C/1emQJAw5tHOaUDyY1ycttqBAPcxuzf7QbY6ec=
-github.com/PuerkitoBio/goquery v1.9.2/go.mod h1:GHPCaP0ODyyxqcNoFGYlAprUFH81NuRPd0GX3Zu2Mvk=
-github.com/PuerkitoBio/goquery v1.10.1 h1:Y8JGYUkXWTGRB6Ars3+j3kN0xg1YqqlwvdTV8WTFQcU=
-github.com/PuerkitoBio/goquery v1.10.1/go.mod h1:IYiHrOMps66ag56LEH7QYDDupKXyo5A8qrjIx3ZtujY=
-github.com/andybalholm/cascadia v1.3.2/go.mod h1:7gtRlve5FxPPgIgX36uWBX58OdBsSS6lUvCFb+h7KvU=
+github.com/PuerkitoBio/goquery v1.11.0 h1:jZ7pwMQXIITcUXNH83LLk+txlaEy6NVOfTuP43xxfqw=
+github.com/PuerkitoBio/goquery v1.11.0/go.mod h1:wQHgxUOU3JGuj3oD/QFfxUdlzW6xPHfqyHre6VMY4DQ=
 github.com/andybalholm/cascadia v1.3.3 h1:AG2YHrzJIm4BZ19iwJ/DAua6Btl3IwJX+VI4kktS1LM=
 github.com/andybalholm/cascadia v1.3.3/go.mod h1:xNd9bqTn98Ln4DwST8/nG+H0yuB8Hmgu1YHNnWw0GeA=
 github.com/araddon/dateparse v0.0.0-20210429162001-6b43995a97de h1:FxWPpzIjnTlhPwqqXc4/vE0f7GvRjuAsbW+HOIe8KnA=
 github.com/araddon/dateparse v0.0.0-20210429162001-6b43995a97de/go.mod h1:DCaWoUhZrYW9p1lxo/cm8EmUOOzAPSEZNGF2DK1dJgw=
-github.com/axllent/semver v0.0.1 h1:QqF+KSGxgj8QZzSXAvKFqjGWE5792ksOnQhludToK8E=
-github.com/axllent/semver v0.0.1/go.mod h1:2xSPzvG8n9mRfdtxSvWvfTfQGWfHsMsHO1iZnKATMSc=
+github.com/axllent/ghru/v2 v2.0.2 h1:xalJupjJAU8Kcs39AwpG53qbcbi3+WKM98BEoQWf/zU=
+github.com/axllent/ghru/v2 v2.0.2/go.mod h1:seMMjx8/0r5ZAL7c0vwTPIRoyN0AoTUqAylZEWZWGK4=
+github.com/axllent/semver v1.0.0 h1:FDekA0alnMed5bWVWjUwBS+6QouZZkmPXsGVmOfjWOg=
+github.com/axllent/semver v1.0.0/go.mod h1:ySHHYLyFX3vKAALmaO8TOOJkzGRsUNmzFiIWwPm8li8=
+github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
+github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
 github.com/cention-sany/utf7 v0.0.0-20170124080048-26cad61bd60a h1:MISbI8sU/PSK/ztvmWKFcI7UGb5/HQT7B+i3a2myKgI=
 github.com/cention-sany/utf7 v0.0.0-20170124080048-26cad61bd60a/go.mod h1:2GxOXOlEPAMFPfp014mK1SWq8G8BN8o7/dfYqJrVGn8=
-github.com/cpuguy83/go-md2man/v2 v2.0.4/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
+github.com/cespare/xxhash/v2 v2.3.0 h1:UL815xU9SqsFlibzuggzjXhog7bL6oX9BbNZnL2UFvs=
+github.com/cespare/xxhash/v2 v2.3.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
+github.com/clipperhouse/displaywidth v0.7.0 h1:QNv1GYsnLX9QBrcWUtMlogpTXuM5FVnBwKWp1O5NwmE=
+github.com/clipperhouse/displaywidth v0.7.0/go.mod h1:R+kHuzaYWFkTm7xoMmK1lFydbci4X2CicfbGstSGg0o=
+github.com/clipperhouse/stringish v0.1.1 h1:+NSqMOr3GR6k1FdRhhnXrLfztGzuG+VuFDfatpWHKCs=
+github.com/clipperhouse/stringish v0.1.1/go.mod h1:v/WhFtE1q0ovMta2+m+UbpZ+2/HEXNWYXQgCt4hdOzA=
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 golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
 golang.org/x/term v0.5.0/go.mod h1:jMB1sMXY+tzblOD4FWmEbocvup2/aLOaQEp7JmGp78k=
-golang.org/x/term v0.7.0/go.mod h1:P32HKFT3hSsZrRxla30E9HqToFYAQPCMs/zFMBUFqPY=
 golang.org/x/term v0.8.0/go.mod h1:xPskH00ivmX89bAKVGSKKtLOWNx2+17Eiy94tnKShWo=
 golang.org/x/term v0.12.0/go.mod h1:owVbMEjm3cBLCHdkQu9b1opXd4ETQWc3BhuQGKgXgvU=
 golang.org/x/term v0.17.0/go.mod h1:lLRBjIVuehSbZlaOtGMbcMncT+aqLLLmKrsjNrUguwk=
-golang.org/x/term v0.19.0/go.mod h1:2CuTdWZ7KHSQwUzKva0cbMg6q2DMI3Mmxp+gKJbskEk=
 golang.org/x/term v0.20.0/go.mod h1:8UkIAJTvZgivsXaD6/pH6U9ecQzZ45awqEOzuCvwpFY=
 golang.org/x/term v0.27.0/go.mod h1:iMsnZpn0cago0GOrHO2+Y7u7JPn5AylBrcoWkElMTSM=
-golang.org/x/term v0.28.0/go.mod h1:Sw/lC2IAUZ92udQNf3WodGtn4k/XoLyZoh8v/8uiwek=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=
@@ -205,47 +229,51 @@ golang.org/x/text v0.13.0/go.mod h1:TvPlkZtksWOMsz7fbANvkp4WM8x/WCo/om8BMLbz+aE=
 golang.org/x/text v0.14.0/go.mod h1:18ZOQIKpY8NJVqYksKHtTdi31H5itFRjB5/qKTNYzSU=
 golang.org/x/text v0.15.0/go.mod h1:18ZOQIKpY8NJVqYksKHtTdi31H5itFRjB5/qKTNYzSU=
 golang.org/x/text v0.21.0/go.mod h1:4IBbMaMmOPCJ8SecivzSH54+73PCFmPWxNTLm+vZkEQ=
-golang.org/x/text v0.22.0 h1:bofq7m3/HAFvbF51jz3Q9wLg3jkvSPuiZu/pD1XwgtM=
-golang.org/x/text v0.22.0/go.mod h1:YRoo4H8PVmsu+E3Ou7cqLVH8oXWIHVoX0jqUWALQhfY=
-golang.org/x/time v0.10.0 h1:3usCWA8tQn0L8+hFJQNgzpWbd89begxN66o1Ojdn5L4=
-golang.org/x/time v0.10.0/go.mod h1:3BpzKBy/shNhVucY/MWOyx10tF3SFh9QdLuxbVysPQM=
+golang.org/x/text v0.33.0 h1:B3njUFyqtHDUI5jMn1YIr5B0IE2U0qck04r6d4KPAxE=
+golang.org/x/text v0.33.0/go.mod h1:LuMebE6+rBincTi9+xWTY8TztLzKHc/9C1uBCG27+q8=
+golang.org/x/time v0.14.0 h1:MRx4UaLrDotUKUdCIqzPC48t1Y9hANFKIRpNx+Te8PI=
+golang.org/x/time v0.14.0/go.mod h1:eL/Oa2bBBK0TkX57Fyni+NgnyQQN4LitPmob2Hjnqw4=
 golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
 golang.org/x/tools v0.0.0-20191119224855-298f0cb1881e/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
 golang.org/x/tools v0.1.12/go.mod h1:hNGJHUnrk76NpqgfD5Aqm5Crs+Hm0VOH/i9J2+nxYbc=
 golang.org/x/tools v0.6.0/go.mod h1:Xwgl3UAJ/d3gWutnCtw505GrjyAbvKui8lOU390QaIU=
 golang.org/x/tools v0.13.0/go.mod h1:HvlwmtVNQAhOuCjW7xxvovg8wbNq7LwfXh/k7wXUl58=
 golang.org/x/tools v0.21.1-0.20240508182429-e35e4ccd0d2d/go.mod h1:aiJjzUbINMkxbQROHiO6hDPo2LHcIPhhQsa9DLh0yGk=
-golang.org/x/tools v0.29.0 h1:Xx0h3TtM9rzQpQuR4dKLrdglAmCEN5Oi+P74JdhdzXE=
-golang.org/x/tools v0.29.0/go.mod h1:KMQVMRsVxU6nHCFXrBPhDB8XncLNLM0lIy/F14RP588=
+golang.org/x/tools v0.41.0 h1:a9b8iMweWG+S0OBnlU36rzLp20z1Rp10w+IY2czHTQc=
+golang.org/x/tools v0.41.0/go.mod h1:XSY6eDqxVNiYgezAVqqCeihT4j1U2CCsqvH3WhQpnlg=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+google.golang.org/protobuf v1.36.11 h1:fV6ZwhNocDyBLK0dj+fg8ektcVegBBuEolpbTQyBNVE=
+google.golang.org/protobuf v1.36.11/go.mod h1:HTf+CrKn2C3g5S8VImy6tdcUvCska2kB7j23XfzDpco=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 h1:YR8cESwS4TdDjEe65xsg0ogRM/Nc3DYOhEAlW+xobZo=
-gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/errgo.v2 v2.1.0/go.mod h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI=
+gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
+gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
-modernc.org/cc/v4 v4.24.4 h1:TFkx1s6dCkQpd6dKurBNmpo+G8Zl4Sq/ztJ+2+DEsh0=
-modernc.org/cc/v4 v4.24.4/go.mod h1:uVtb5OGqUKpoLWhqwNQo/8LwvoiEBLvZXIQ/SmO6mL0=
-modernc.org/ccgo/v4 v4.23.16 h1:Z2N+kk38b7SfySC1ZkpGLN2vthNJP1+ZzGZIlH7uBxo=
-modernc.org/ccgo/v4 v4.23.16/go.mod h1:nNma8goMTY7aQZQNTyN9AIoJfxav4nvTnvKThAeMDdo=
-modernc.org/fileutil v1.3.0 h1:gQ5SIzK3H9kdfai/5x41oQiKValumqNTDXMvKo62HvE=
-modernc.org/fileutil v1.3.0/go.mod h1:XatxS8fZi3pS8/hKG2GH/ArUogfxjpEKs3Ku3aK4JyQ=
-modernc.org/gc/v2 v2.6.3 h1:aJVhcqAte49LF+mGveZ5KPlsp4tdGdAOT4sipJXADjw=
-modernc.org/gc/v2 v2.6.3/go.mod h1:YgIahr1ypgfe7chRuJi2gD7DBQiKSLMPgBQe9oIiito=
-modernc.org/libc v1.61.12 h1:Fsnh0A7XLXylYNwIOJmKux9PhnfrIvMaMnjuyJ1t/f4=
-modernc.org/libc v1.61.12/go.mod h1:8F/uJWL/3nNil0Lgt1Dpz+GgkApWh04N3el3hxJcA6E=
+modernc.org/cc/v4 v4.27.1 h1:9W30zRlYrefrDV2JE2O8VDtJ1yPGownxciz5rrbQZis=
+modernc.org/cc/v4 v4.27.1/go.mod h1:uVtb5OGqUKpoLWhqwNQo/8LwvoiEBLvZXIQ/SmO6mL0=
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+modernc.org/fileutil v1.3.40 h1:ZGMswMNc9JOCrcrakF1HrvmergNLAmxOPjizirpfqBA=
+modernc.org/fileutil v1.3.40/go.mod h1:HxmghZSZVAz/LXcMNwZPA/DRrQZEVP9VX0V4LQGQFOc=
+modernc.org/gc/v2 v2.6.5 h1:nyqdV8q46KvTpZlsw66kWqwXRHdjIlJOhG6kxiV/9xI=
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-modernc.org/sqlite v1.34.5 h1:Bb6SR13/fjp15jt70CL4f18JIN7p7dnMExd+UFnF15g=
-modernc.org/sqlite v1.34.5/go.mod h1:YLuNmX9NKs8wRNK2ko1LW1NGYcc9FkBO69JOt1AR9JE=
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install.sh

@@ -1,98 +1,214 @@
-#!/usr/bin/env bash
+#!/bin/sh
 
-GH_REPO="axllent/mailpit"
-TIMEOUT=90
+# This script will install the latest release of Mailpit.
 
-set -e
+# Check dependencies is installed
+for cmd in curl tar; do
+    if ! command -v "$cmd" >/dev/null 2>&1; then
+        echo "Then $cmd command is required but not installed."
+        echo "Please install $cmd and try again."
+        exit 1
+    fi
+done
 
-VERSION=$(curl --silent --location --max-time "${TIMEOUT}" "https://api.github.com/repos/${GH_REPO}/releases/latest" | grep '"tag_name":' | sed -E 's/.*"([^"]+)".*/\1/')
-if [ $? -ne 0 ]; then
-    echo -ne "\nThere was an error trying to check what is the latest version of Mailpit.\nPlease try again later.\n"
-    exit 1
-fi
-
-# detect the platform
-OS="$(uname)"
-case $OS in
-Linux)
-    OS='linux'
-    ;;
-FreeBSD)
-    OS='freebsd'
-    echo 'OS not supported'
-    exit 2
-    ;;
-NetBSD)
-    OS='netbsd'
-    echo 'OS not supported'
-    exit 2
-    ;;
-OpenBSD)
-    OS='openbsd'
-    echo 'OS not supported'
-    exit 2
-    ;;
-Darwin)
-    OS='darwin'
-    ;;
-SunOS)
-    OS='solaris'
-    echo 'OS not supported'
-    exit 2
-    ;;
+# Check if the OS is supported.
+OS=
+case "$(uname -s)" in
+Linux) OS="linux" ;;
+Darwin) OS="darwin" ;;
 *)
-    echo 'OS not supported'
+    echo "OS not supported."
     exit 2
     ;;
 esac
 
-# detect the arch
-OS_type="$(uname -m)"
-case "$OS_type" in
+# Detect the architecture of the OS.
+OS_ARCH=
+case "$(uname -m)" in
 x86_64 | amd64)
-    OS_type='amd64'
+    OS_ARCH="amd64"
     ;;
 i?86 | x86)
-    OS_type='386'
+    OS_ARCH="386"
     ;;
 aarch64 | arm64)
-    OS_type='arm64'
+    OS_ARCH="arm64"
     ;;
 *)
-    echo 'OS type not supported'
+    echo "OS architecture not supported."
     exit 2
     ;;
 esac
 
-GH_REPO_BIN="mailpit-${OS}-${OS_type}.tar.gz"
+GH_REPO="axllent/mailpit"
+INSTALL_PATH="${INSTALL_PATH:-/usr/local/bin}"
+TIMEOUT=90
+# This is used to authenticate with the GitHub API. (Fix the public rate limiting issue)
+# Try the GITHUB_TOKEN environment variable is set globally.
+GITHUB_API_TOKEN="${GITHUB_TOKEN:-}"
 
-#create tmp directory and move to it with macOS compatibility fallback
-tmp_dir=$(mktemp -d 2>/dev/null || mktemp -d -t 'mailpit-install.XXXXXXXXXX')
-cd "$tmp_dir"
+# Update the default values if the user has set.
+while [ $# -gt 0 ]; do
+    case $1 in
+    --install-path)
+        shift
+        case "$1" in
+        */*)
+            # Remove trailing slashes from the path.
+            INSTALL_PATH="$(echo "$1" | sed 's#/\+$##')"
+            [ -z "$INSTALL_PATH" ] && INSTALL_PATH="/"
+            ;;
+        esac
+        ;;
+    --auth | --auth-token | --github-token | --token)
+        shift
+        case "$1" in
+        gh*)
+            GITHUB_API_TOKEN="$1"
+            ;;
+        esac
+        ;;
+    *) ;;
+    esac
+    shift
+done
 
-echo "Downloading Mailpit $VERSION"
-LINK="https://github.com/${GH_REPO}/releases/download/${VERSION}/${GH_REPO_BIN}"
+# Description of the sort parameters for curl command.
+# -s: Silent mode.
+# -f: Fail silently on server errors.
+# -L: Follow redirects.
+# -m: Set maximum time allowed for the transfer.
 
-curl --silent --location --max-time "${TIMEOUT}" "${LINK}" | tar zxf - || {
-    echo "Error downloading"
-    exit 2
-}
+if [ -n "$GITHUB_API_TOKEN" ] && [ "${#GITHUB_API_TOKEN}" -gt 36 ]; then
+    CURL_OUTPUT="$(curl -sfL -m $TIMEOUT -H "Authorization: Bearer $GITHUB_API_TOKEN" https://api.github.com/repos/${GH_REPO}/releases/latest)"
+    EXIT_CODE=$?
+else
+    CURL_OUTPUT="$(curl -sfL -m $TIMEOUT https://api.github.com/repos/${GH_REPO}/releases/latest)"
+    EXIT_CODE=$?
+fi
 
-mkdir -p /usr/local/bin || exit 2
-cp mailpit /usr/local/bin/ || exit 2
-chmod 755 /usr/local/bin/mailpit || exit 2
-case "$OS" in
-'linux')
-    chown root:root /usr/local/bin/mailpit || exit 2
-    ;;
-'freebsd' | 'openbsd' | 'netbsd' | 'darwin')
-    chown root:wheel /usr/local/bin/mailpit || exit 2
-    ;;
+VERSION=""
+if [ $EXIT_CODE -eq 0 ]; then
+    # Extracts the latest version using jq, awk, or sed.
+    if command -v jq >/dev/null 2>&1; then
+        # Use jq -n because the output is not a valid JSON in sh.
+        VERSION=$(jq -n "$CURL_OUTPUT" | jq -r '.tag_name')
+    elif command -v awk >/dev/null 2>&1; then
+        VERSION=$(echo "$CURL_OUTPUT" | awk -F: '$1 ~ /tag_name/ {gsub(/[^v0-9\.]+/, "", $2) ;print $2; exit}')
+    elif command -v sed >/dev/null 2>&1; then
+        VERSION=$(echo "$CURL_OUTPUT" | sed -n 's/.*"tag_name": *"\([^"]*\)".*/\1/p')
+    else
+        EXIT_CODE=3
+    fi
+fi
+
+# Validate the version.
+case "$VERSION" in
+v[0-9][0-9\.]*) ;;
 *)
-    echo 'OS not supported'
-    exit 2
+    echo "There was an error trying to check what is the latest version of Mailpit."
+    echo "Please try again later."
+    exit $EXIT_CODE
     ;;
 esac
 
-rm -rf "$tmp_dir"
-echo "Installed successfully to /usr/local/bin/mailpit"
+TEMP_DIR="$(mktemp -qd)"
+EXIT_CODE=$?
+# Ensure the temporary directory exists and is a directory.
+if [ -z "$TEMP_DIR" ] || [ ! -d "$TEMP_DIR" ]; then
+    echo "ERROR: Creating temporary directory."
+    exit $EXIT_CODE
+fi
+
+GH_REPO_BIN="mailpit-${OS}-${OS_ARCH}.tar.gz"
+if [ "$INSTALL_PATH" = "/" ]; then
+    INSTALL_BIN_PATH="/mailpit"
+else
+    INSTALL_BIN_PATH="${INSTALL_PATH}/mailpit"
+fi
+cd "$TEMP_DIR" || EXIT_CODE=$?
+if [ $EXIT_CODE -eq 0 ]; then
+    # Download the latest release.
+    #
+    # Description of the sort parameters for curl command.
+    # -s: Silent mode.
+    # -f: Fail silently on server errors.
+    # -L: Follow redirects.
+    # -m: Set maximum time allowed for the transfer.
+    # -o: Write output to a file instead of stdout.
+    curl -sfL -m $TIMEOUT -o "${GH_REPO_BIN}" "https://github.com/${GH_REPO}/releases/download/${VERSION}/${GH_REPO_BIN}"
+    EXIT_CODE=$?
+
+    # The following conditions check each step of the installation.
+    # If there is an error in any of the steps, an error message is printed.
+
+    if [ $EXIT_CODE -eq 0 ]; then
+        if ! [ -f "${GH_REPO_BIN}" ]; then
+            EXIT_CODE=1
+            echo "ERROR: Downloading latest release."
+        fi
+    fi
+
+    if [ $EXIT_CODE -eq 0 ]; then
+        tar zxf "$GH_REPO_BIN"
+        EXIT_CODE=$?
+        if [ $EXIT_CODE -ne 0 ]; then
+            echo "ERROR: Extracting \"${GH_REPO_BIN}\"."
+        fi
+    fi
+
+    if [ $EXIT_CODE -eq 0 ] && [ ! -d "$INSTALL_PATH" ]; then
+        mkdir -p "${INSTALL_PATH}"
+        EXIT_CODE=$?
+        if [ $EXIT_CODE -ne 0 ]; then
+            echo "ERROR: Creating \"${INSTALL_PATH}\" directory."
+        fi
+    fi
+
+    if [ $EXIT_CODE -eq 0 ]; then
+        cp mailpit "$INSTALL_BIN_PATH"
+        EXIT_CODE=$?
+        if [ $EXIT_CODE -ne 0 ]; then
+            echo "ERROR: Copying mailpit to \"${INSTALL_PATH}\" directory."
+        fi
+    fi
+
+    if [ $EXIT_CODE -eq 0 ]; then
+        chmod 755 "$INSTALL_BIN_PATH"
+        EXIT_CODE=$?
+        if [ $EXIT_CODE -ne 0 ]; then
+            echo "ERROR: Setting permissions for \"$INSTALL_BIN_PATH\" binary."
+        fi
+    fi
+
+    # Set the owner and group to root:root if the script is run as root.
+    if [ $EXIT_CODE -eq 0 ] && [ "$(id -u)" -eq "0" ]; then
+        OWNER="root"
+        GROUP="root"
+        # Set the OWNER, GROUP variable when the OS not use the default root:root.
+        case "$OS" in
+        darwin) GROUP="wheel" ;;
+        *) ;;
+        esac
+
+        chown "${OWNER}:${GROUP}" "$INSTALL_BIN_PATH"
+        EXIT_CODE=$?
+        if [ $EXIT_CODE -ne 0 ]; then
+            echo "ERROR: Setting ownership for \"$INSTALL_BIN_PATH\" binary."
+        fi
+    fi
+else
+    echo "ERROR: Changing to temporary directory."
+    exit $EXIT_CODE
+fi
+
+# Cleanup the temporary directory.
+rm -rf "$TEMP_DIR"
+# Check the EXIT_CODE variable, and print the success or error message.
+if [ $EXIT_CODE -ne 0 ]; then
+    echo "There was an error installing Mailpit."
+    exit $EXIT_CODE
+fi
+
+echo "Installed successfully to \"$INSTALL_BIN_PATH\"."
+exit 0

internal/auth/auth.go

@@ -11,6 +11,8 @@ import (
 var (
 	// UICredentials passwords
 	UICredentials *htpasswd.File
+	// SendAPICredentials passwords
+	SendAPICredentials *htpasswd.File
 	// SMTPCredentials passwords
 	SMTPCredentials *htpasswd.File
 	// POP3Credentials passwords
@@ -36,6 +38,25 @@ func SetUIAuth(s string) error {
 	return nil
 }
 
+// SetSendAPIAuth will set Send API credentials
+func SetSendAPIAuth(s string) error {
+	var err error
+
+	credentials := credentialsFromString(s)
+	if len(credentials) == 0 {
+		return nil
+	}
+
+	r := strings.NewReader(strings.Join(credentials, "\n"))
+
+	SendAPICredentials, err = htpasswd.NewFromReader(r, htpasswd.DefaultSystems, nil)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
 // SetSMTPAuth will set SMTP credentials
 func SetSMTPAuth(s string) error {
 	var err error

internal/dump/dump.go

@@ -0,0 +1,163 @@
+// Package dump is used to export all messages from mailpit into a directory
+package dump
+
+import (
+	"encoding/json"
+	"errors"
+	"io"
+	"net/http"
+	"os"
+	"path"
+	"regexp"
+	"strings"
+
+	"github.com/axllent/mailpit/config"
+	"github.com/axllent/mailpit/internal/logger"
+	"github.com/axllent/mailpit/internal/storage"
+	"github.com/axllent/mailpit/internal/tools"
+	"github.com/axllent/mailpit/server/apiv1"
+)
+
+var (
+	linkRe = regexp.MustCompile(`(?i)^https?:\/\/`)
+
+	outDir string
+
+	// Base URL of mailpit instance
+	base string
+
+	// URL is the base URL of a remove Mailpit instance
+	URL string
+
+	summary = []storage.MessageSummary{}
+)
+
+// Sync will sync all messages from the specified database or API to the specified output directory
+func Sync(d string) error {
+
+	outDir = path.Clean(d)
+
+	if URL != "" {
+		if !linkRe.MatchString(URL) {
+			return errors.New("invalid URL")
+		}
+
+		base = strings.TrimRight(URL, "/") + "/"
+	}
+
+	if base == "" && config.Database == "" {
+		return errors.New("no database or API URL specified")
+	}
+
+	if !tools.IsDir(outDir) {
+		if err := os.MkdirAll(outDir, 0755); /* #nosec */ err != nil {
+			return err
+		}
+	}
+
+	if err := loadIDs(); err != nil {
+		return err
+	}
+
+	if err := saveMessages(); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+// LoadIDs will load all message IDs from the specified database or API
+func loadIDs() error {
+	if base != "" {
+		// remote
+		logger.Log().Debugf("Fetching messages summary from %s", base)
+		res, err := http.Get(base + "api/v1/messages?limit=0")
+
+		if err != nil {
+			return err
+		}
+
+		body, err := io.ReadAll(res.Body)
+
+		if err != nil {
+			return err
+		}
+
+		var data apiv1.MessagesSummary
+		if err := json.Unmarshal(body, &data); err != nil {
+			return err
+		}
+
+		summary = data.Messages
+
+	} else {
+		// make sure the database isn't pruned while open
+		config.MaxMessages = 0
+
+		var err error
+		// local database
+		if err = storage.InitDB(); err != nil {
+			return err
+		}
+
+		logger.Log().Debugf("Fetching messages summary from %s", config.Database)
+
+		summary, err = storage.List(0, 0, 0)
+		if err != nil {
+			return err
+		}
+	}
+
+	if len(summary) == 0 {
+		return errors.New("no messages found")
+	}
+
+	return nil
+}
+
+func saveMessages() error {
+	for _, m := range summary {
+		out := path.Join(outDir, m.ID+".eml")
+
+		// skip if message exists
+		if tools.IsFile(out) {
+			continue
+		}
+
+		var b []byte
+
+		if base != "" {
+			res, err := http.Get(base + "api/v1/message/" + m.ID + "/raw")
+
+			if err != nil {
+				logger.Log().Errorf("error fetching message %s: %s", m.ID, err.Error())
+				continue
+			}
+
+			b, err = io.ReadAll(res.Body)
+
+			if err != nil {
+				logger.Log().Errorf("error fetching message %s: %s", m.ID, err.Error())
+				continue
+			}
+		} else {
+			var err error
+			b, err = storage.GetMessageRaw(m.ID)
+			if err != nil {
+				logger.Log().Errorf("error fetching message %s: %s", m.ID, err.Error())
+				continue
+			}
+		}
+
+		if err := os.WriteFile(out, b, 0644); /* #nosec */ err != nil {
+			logger.Log().Errorf("error writing message %s: %s", m.ID, err.Error())
+			continue
+		}
+
+		_ = os.Chtimes(out, m.Created, m.Created)
+
+		logger.Log().Debugf("Saved message %s to %s", m.ID, out)
+	}
+
+	return nil
+}

internal/htmlcheck/caniemail-data.json

@@ -1,6 +1,6 @@
 {
 	"api_version":"1.0.4",
-	"last_update_date":"2024-11-29 15:25:23 +0000",
+	"last_update_date":"2025-11-10 14:54:35 +0000",
 	"nicenames":{"family":{"gmail":"Gmail","outlook":"Outlook","yahoo":"Yahoo! Mail","apple-mail":"Apple Mail","aol":"AOL","thunderbird":"Mozilla Thunderbird","microsoft":"Microsoft","samsung-email":"Samsung Email","sfr":"SFR","orange":"Orange","protonmail":"ProtonMail","hey":"HEY","mail-ru":"Mail.ru","fastmail":"Fastmail","laposte":"LaPoste.net","t-online-de":"T-online.de","free-fr":"Free.fr","gmx":"GMX","web-de":"WEB.DE","ionos-1and1":"1&1","rainloop":"RainLoop","wp-pl":"WP.pl"},"platform":{"desktop-app":"Desktop","desktop-webmail":"Desktop Webmail","mobile-webmail":"Mobile Webmail","webmail":"Webmail","ios":"iOS","android":"Android","windows":"Windows","macos":"macOS","windows-mail":"Windows Mail","outlook-com":"Outlook.com"},"support":{"supported":"Supported","mitigated":"Partially supported","unsupported":"Not supported","unknown":"Support unknown","mixed":"Mixed support"},"category":{"html":"HTML","css":"CSS","image":"Image formats","others":"Others"}},
 	"data":[
 		{
@@ -110,7 +110,7 @@
 			"last_test_date":"2023-12-19",
 			"test_url":"https://www.caniemail.com/tests/css-font-face.html",
 			"test_results_url":"https://app.emailonacid.com/app/acidtest/veY9MhuhgFeF1ly5crrhTXawfLJSwxgpYi27OElI7iSoc/list",
-			"stats":{"apple-mail":{"macos":{"12.2":"y"},"ios":{"10.3":"y","12.3.1":"y"}},"gmail":{"desktop-webmail":{"2019-07":"n #6"},"ios":{"2019-07":"n"},"android":{"2019-07":"n"},"mobile-webmail":{"2020-02":"n"}},"orange":{"desktop-webmail":{"2019-05":"a #2","2021-03":"n #7","2024-03":"n"},"ios":{"2019-07":"y","2024-03":"n"},"android":{"2019-07":"a #1","2024-04":"n"}},"outlook":{"windows":{"2003":"a #3","2007":"a #4 #5","2010":"a #4 #5","2013":"a #4 #5","2016":"a #4 #5","2019":"a #4"},"windows-mail":{"2020-01":"n"},"macos":{"2011":"y","2016":"y","16.80":"n"},"outlook-com":{"2019-07":"n","2023-12":"n"},"ios":{"2.51.1":"y","3.29.0":"n"},"android":{"2019-07":"n"}},"samsung-email":{"android":{"6.0":"y #8","2021-11":"y #8"}},"sfr":{"desktop-webmail":{"2019-07":"a #2"},"ios":{"2019-07":"n"},"android":{"2019-07":"n"}},"thunderbird":{"macos":{"60.7":"y","78.5":"y"}},"aol":{"desktop-webmail":{"2020-01":"n"},"ios":{"2020-01":"n"},"android":{"2020-01":"n"}},"yahoo":{"desktop-webmail":{"2019-07":"n"},"ios":{"2019-07":"n"},"android":{"2019-07":"n"}},"protonmail":{"desktop-webmail":{"2020-03":"n"},"ios":{"2020-03":"n"},"android":{"2020-03":"y"}},"hey":{"desktop-webmail":{"2020-06":"y"}},"mail-ru":{"desktop-webmail":{"2020-10":"n"}},"fastmail":{"desktop-webmail":{"2021-07":"n"}},"laposte":{"desktop-webmail":{"2021-08":"a #2"}},"gmx":{"desktop-webmail":{"2022-06":"n"},"ios":{"2022-06":"y"},"android":{"2022-06":"n"}},"web-de":{"desktop-webmail":{"2022-06":"n"},"ios":{"2022-06":"y"},"android":{"2022-06":"n"}},"ionos-1and1":{"desktop-webmail":{"2022-06":"y"},"android":{"2022-06":"n"}}},
+			"stats":{"apple-mail":{"macos":{"12.2":"y"},"ios":{"10.3":"y","12.3.1":"y"}},"gmail":{"desktop-webmail":{"2019-07":"n #6"},"ios":{"2019-07":"n"},"android":{"2019-07":"n"},"mobile-webmail":{"2020-02":"n"}},"orange":{"desktop-webmail":{"2019-05":"a #2","2021-03":"n #7","2024-03":"n"},"ios":{"2019-07":"y","2024-03":"n"},"android":{"2019-07":"a #1","2024-04":"n"}},"outlook":{"windows":{"2003":"a #3","2007":"a #4 #5","2010":"a #4 #5","2013":"a #4 #5","2016":"a #4 #5","2019":"a #4"},"windows-mail":{"2020-01":"n"},"macos":{"2011":"y","2016":"y","16.80":"n"},"outlook-com":{"2019-07":"n","2023-12":"n"},"ios":{"2.51.1":"y","3.29.0":"n"},"android":{"2019-07":"n"}},"samsung-email":{"android":{"6.0":"y #8","2021-11":"y #8"}},"sfr":{"desktop-webmail":{"2019-07":"a #2","2025-07":"n"},"ios":{"2019-07":"n"},"android":{"2019-07":"n"}},"thunderbird":{"macos":{"60.7":"y","78.5":"y"}},"aol":{"desktop-webmail":{"2020-01":"n"},"ios":{"2020-01":"n"},"android":{"2020-01":"n"}},"yahoo":{"desktop-webmail":{"2019-07":"n"},"ios":{"2019-07":"n"},"android":{"2019-07":"n"}},"protonmail":{"desktop-webmail":{"2020-03":"n"},"ios":{"2020-03":"n"},"android":{"2020-03":"y"}},"hey":{"desktop-webmail":{"2020-06":"y"}},"mail-ru":{"desktop-webmail":{"2020-10":"n"}},"fastmail":{"desktop-webmail":{"2021-07":"n"}},"laposte":{"desktop-webmail":{"2021-08":"a #2","2025-07":"n"}},"gmx":{"desktop-webmail":{"2022-06":"n"},"ios":{"2022-06":"y"},"android":{"2022-06":"n"}},"web-de":{"desktop-webmail":{"2022-06":"n"},"ios":{"2022-06":"y"},"android":{"2022-06":"n"}},"ionos-1and1":{"desktop-webmail":{"2022-06":"y"},"android":{"2022-06":"n"}}},
 			"notes":null,
 			"notes_by_num":{"1":"Partial. Only supported through a `<link>` tag.","2":"Partial. Only supported directly through a `<style>` tag.","3":"Buggy. Support depends on the version of IE installed.","4":"Partial. The declaration is supported but distant fonts are ignored.","5":"Buggy. Elements using a font declared with `@font-face` ignore the font stack and fall back to Times New Roman. Use `mso-generic-font-family` and `mso-font-alt` to control the fallback.","6":"Not supported. Roboto and Google Sans can be used, but only because they're embedded with the webmail's own styles.","7":"Not supported. The `@font-face` declaration is kept but the `src` property is removed.","8":"Not supported when using a Microsoft email address; outlook, live, hotmail, etc."}
 		},
@@ -126,7 +126,7 @@
 			"last_test_date":"2019-02-28",
 			"test_url":"https://www.caniemail.com/tests/css-placement.html",
 			"test_results_url":"https://app.emailonacid.com/app/acidtest/6vV9sx4RoRsdnkZBDjLWwSC18VcUQzJY00tlj2NVSxKKv/list",
-			"stats":{"apple-mail":{"macos":{"12.4":"y"},"ios":{"12.1":"y"}},"gmail":{"desktop-webmail":{"2019-02":"n"},"ios":{"2019-02":"n"},"android":{"2019-02":"n"},"mobile-webmail":{"2020-02":"n"}},"orange":{"desktop-webmail":{"2019-08":"n","2021-03":"n"},"ios":{"2019-08":"y","2023-12":"n"},"android":{"2019-08":"y","2023-12":"n"}},"outlook":{"windows":{"2007":"y","2010":"y","2013":"y","2016":"y","2019":"y"},"windows-mail":{"2019-02":"y"},"macos":{"2019-02":"y","16.80":"n"},"outlook-com":{"2019-02":"n","2023-12":"n"},"ios":{"2019-02":"n"},"android":{"2019-02":"n"}},"thunderbird":{"macos":{"60.8":"y","78.5":"n"}},"yahoo":{"desktop-webmail":{"2019-02":"n"},"ios":{"2019-02":"n"},"android":{"2019-02":"n"}},"aol":{"desktop-webmail":{"2019-02":"n"},"ios":{"2019-02":"n"},"android":{"2020-01":"n"}},"samsung-email":{"android":{"5.0.10.2":"n"}},"sfr":{"desktop-webmail":{"2019-08":"n"},"ios":{"2019-08":"n"},"android":{"2019-08":"n"}},"protonmail":{"desktop-webmail":{"2020-03":"n"},"ios":{"2020-03":"n"},"android":{"2020-03":"y"}},"hey":{"desktop-webmail":{"2020-06":"y"}},"mail-ru":{"desktop-webmail":{"2020-10":"n"}},"fastmail":{"desktop-webmail":{"2021-07":"n"}},"laposte":{"desktop-webmail":{"2021-08":"n"}},"gmx":{"desktop-webmail":{"2022-06":"n"},"ios":{"2022-06":"y"},"android":{"2022-06":"n"}},"web-de":{"desktop-webmail":{"2022-06":"n"},"ios":{"2022-06":"y"},"android":{"2022-06":"n"}},"ionos-1and1":{"desktop-webmail":{"2022-06":"y"},"android":{"2022-06":"n"}},"wp-pl":{"desktop-webmail":{"2023-12":"n"}}},
+			"stats":{"apple-mail":{"macos":{"12.4":"y"},"ios":{"12.1":"y"}},"gmail":{"desktop-webmail":{"2019-02":"n"},"ios":{"2019-02":"n"},"android":{"2019-02":"n"},"mobile-webmail":{"2020-02":"n"}},"orange":{"desktop-webmail":{"2019-08":"n","2021-03":"n"},"ios":{"2019-08":"y","2023-12":"n"},"android":{"2019-08":"y","2023-12":"n"}},"outlook":{"windows":{"2007":"y","2010":"y","2013":"y","2016":"y","2019":"y"},"windows-mail":{"2019-02":"y"},"macos":{"2019-02":"y","16.80":"n"},"outlook-com":{"2019-02":"n","2023-12":"n"},"ios":{"2019-02":"n"},"android":{"2019-02":"n"}},"thunderbird":{"macos":{"60.8":"y","78.5":"n"}},"yahoo":{"desktop-webmail":{"2019-02":"n"},"ios":{"2019-02":"n"},"android":{"2019-02":"n"}},"aol":{"desktop-webmail":{"2019-02":"n"},"ios":{"2019-02":"n"},"android":{"2020-01":"n"}},"samsung-email":{"android":{"5.0.10.2":"n"}},"sfr":{"desktop-webmail":{"2019-08":"n","2025-07":"n"},"ios":{"2019-08":"n"},"android":{"2019-08":"n"}},"protonmail":{"desktop-webmail":{"2020-03":"n"},"ios":{"2020-03":"n"},"android":{"2020-03":"y"}},"hey":{"desktop-webmail":{"2020-06":"y"}},"mail-ru":{"desktop-webmail":{"2020-10":"n"}},"fastmail":{"desktop-webmail":{"2021-07":"n"}},"laposte":{"desktop-webmail":{"2021-08":"n","2025-07":"n"}},"gmx":{"desktop-webmail":{"2022-06":"n"},"ios":{"2022-06":"y"},"android":{"2022-06":"n"}},"web-de":{"desktop-webmail":{"2022-06":"n"},"ios":{"2022-06":"y"},"android":{"2022-06":"n"}},"ionos-1and1":{"desktop-webmail":{"2022-06":"y"},"android":{"2022-06":"n"}},"wp-pl":{"desktop-webmail":{"2023-12":"n"}}},
 			"notes":null,
 			"notes_by_num":null
 		},
@@ -142,7 +142,7 @@
 			"last_test_date":"2021-05-25",
 			"test_url":"https://www.caniemail.com/tests/css-animation.html",
 			"test_results_url":"https://app.emailonacid.com/app/acidtest/u4oWccYOFNNyTagHs2NSUZqJYQ3MssrqDMocBnRa35hf7/list",
-			"stats":{"apple-mail":{"macos":{"13":"y"},"ios":{"13":"y"}},"gmail":{"desktop-webmail":{"2021-05":"n"},"ios":{"2021-05":"n"},"android":{"2021-05":"n"},"mobile-webmail":{"2021-05":"n"}},"orange":{"desktop-webmail":{"2021-05":"n #1"},"ios":{"2021-05":"n"},"android":{"2021-05":"n"}},"outlook":{"windows":{"2003":"n","2007":"n","2010":"n","2013":"n","2016":"n","2019":"n"},"windows-mail":{"2021-05":"n"},"macos":{"2011":"y","2016":"y","16.80":"n"},"outlook-com":{"2021-05":"n"},"ios":{"2021-05":"n"},"android":{"2021-05":"n"}},"samsung-email":{"android":{"6.1":"y"}},"sfr":{"desktop-webmail":{"2021-05":"a #1"},"ios":{"2021-05":"n"},"android":{"2021-05":"n"}},"thunderbird":{"macos":{"78.10":"y"}},"aol":{"desktop-webmail":{"2021-05":"y"},"ios":{"2021-05":"n"},"android":{"2021-05":"n"}},"yahoo":{"desktop-webmail":{"2021-05":"y"},"ios":{"2021-05":"n"},"android":{"2021-05":"n"}},"protonmail":{"desktop-webmail":{"2021-05":"n"},"ios":{"2021-05":"n"},"android":{"2021-05":"n"}},"hey":{"desktop-webmail":{"2021-05":"y"}},"mail-ru":{"desktop-webmail":{"2021-05":"n"}},"fastmail":{"desktop-webmail":{"2021-07":"y"}},"laposte":{"desktop-webmail":{"2021-08":"a #1"}},"gmx":{"desktop-webmail":{"2022-06":"n"},"ios":{"2022-06":"y"},"android":{"2022-06":"y"}},"web-de":{"desktop-webmail":{"2022-06":"n"},"ios":{"2022-06":"y"},"android":{"2022-06":"y"}},"ionos-1and1":{"desktop-webmail":{"2022-06":"a #2"},"android":{"2022-06":"y"}}},
+			"stats":{"apple-mail":{"macos":{"13":"y"},"ios":{"13":"y"}},"gmail":{"desktop-webmail":{"2021-05":"n"},"ios":{"2021-05":"n"},"android":{"2021-05":"n"},"mobile-webmail":{"2021-05":"n"}},"orange":{"desktop-webmail":{"2021-05":"n #1"},"ios":{"2021-05":"n"},"android":{"2021-05":"n"}},"outlook":{"windows":{"2003":"n","2007":"n","2010":"n","2013":"n","2016":"n","2019":"n"},"windows-mail":{"2021-05":"n"},"macos":{"2011":"y","2016":"y","16.80":"n"},"outlook-com":{"2021-05":"n"},"ios":{"2021-05":"n"},"android":{"2021-05":"n"}},"samsung-email":{"android":{"6.1":"y"}},"sfr":{"desktop-webmail":{"2021-05":"a #1","2025-07":"n"},"ios":{"2021-05":"n"},"android":{"2021-05":"n"}},"thunderbird":{"macos":{"78.10":"y"}},"aol":{"desktop-webmail":{"2021-05":"y"},"ios":{"2021-05":"n"},"android":{"2021-05":"n"}},"yahoo":{"desktop-webmail":{"2021-05":"y"},"ios":{"2021-05":"n"},"android":{"2021-05":"n"}},"protonmail":{"desktop-webmail":{"2021-05":"n"},"ios":{"2021-05":"n"},"android":{"2021-05":"n"}},"hey":{"desktop-webmail":{"2021-05":"y"}},"mail-ru":{"desktop-webmail":{"2021-05":"n"}},"fastmail":{"desktop-webmail":{"2021-07":"y"}},"laposte":{"desktop-webmail":{"2021-08":"a #1","2025-07":"n"}},"gmx":{"desktop-webmail":{"2022-06":"n"},"ios":{"2022-06":"y"},"android":{"2022-06":"y"}},"web-de":{"desktop-webmail":{"2022-06":"n"},"ios":{"2022-06":"y"},"android":{"2022-06":"y"}},"ionos-1and1":{"desktop-webmail":{"2022-06":"a #2"},"android":{"2022-06":"y"}}},
 			"notes":null,
 			"notes_by_num":{"1":"Not supported. The `@keyframes` declaration is kept but values are incorrectly prefixed.","2":"Partial. Only supports from and to keyframes. Does not support % keyframes"}
 		},
@@ -158,7 +158,7 @@
 			"last_test_date":"2019-08-20",
 			"test_url":"https://www.caniemail.com/tests/css-media.html",
 			"test_results_url":"https://app.emailonacid.com/app/acidtest/hMLCNCSKZYHkLgLOpIWltlnYjtagbNsrwzMxalc2VbghN/list",
-			"stats":{"apple-mail":{"macos":{"10.3":"y"},"ios":{"10.3":"y","12.2":"y"}},"gmail":{"desktop-webmail":{"2019-08":"n"},"ios":{"2019-08":"n"},"android":{"2019-08":"n"},"mobile-webmail":{"2020-02":"n"}},"orange":{"desktop-webmail":{"2019-08":"y #1","2021-03":"y"},"ios":{"2019-08":"y"},"android":{"2019-08":"y"}},"outlook":{"windows":{"2003":"n","2007":"n","2010":"n","2013":"n","2016":"n","2019":"n"},"windows-mail":{"2020-01":"n"},"macos":{"2011":"y","2016":"y","16.80":"y"},"outlook-com":{"2019-08":"y"},"ios":{"2019-08":"y"},"android":{"2019-08":"y"}},"samsung-email":{"android":{"5.0.10.2":"y","6.0":"y"}},"sfr":{"desktop-webmail":{"2019-08":"y"},"ios":{"2019-08":"n"},"android":{"2019-08":"n"}},"thunderbird":{"macos":{"60.3":"n","78.5":"n"}},"yahoo":{"desktop-webmail":{"2019-08":"n"},"ios":{"2019-08":"n"},"android":{"2019-08":"n"}},"aol":{"desktop-webmail":{"2019-02":"n"},"ios":{"2019-02":"n"},"android":{"2019-02":"n"}},"protonmail":{"desktop-webmail":{"2020-03":"n"},"ios":{"2020-03":"n"},"android":{"2020-03":"y"}},"hey":{"desktop-webmail":{"2020-06":"y"}},"mail-ru":{"desktop-webmail":{"2020-10":"n"}},"fastmail":{"desktop-webmail":{"2021-07":"y"}},"laposte":{"desktop-webmail":{"2021-08":"y"}},"gmx":{"desktop-webmail":{"2022-06":"n"},"ios":{"2022-06":"y"},"android":{"2022-06":"y"}},"web-de":{"desktop-webmail":{"2022-06":"n"},"ios":{"2022-06":"y"},"android":{"2022-06":"y"}},"ionos-1and1":{"desktop-webmail":{"2022-06":"y"},"android":{"2022-06":"y"}}},
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 			"notes":null,
 			"notes_by_num":{"1":"Buggy. The first rule inside a media query is not prefixed."}
 		},
@@ -174,7 +174,7 @@
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 			"test_url":"https://www.caniemail.com/tests/css-media-hover.html",
 			"test_results_url":"https://testi.at/proj/onECpNVH8Dhv7BSLPXUbQ4s0O",
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 			"notes":null,
 			"notes_by_num":null
 		},
@@ -190,9 +190,9 @@
 			"last_test_date":"2019-08-20",
 			"test_url":"https://www.caniemail.com/tests/css-media.html",
 			"test_results_url":"https://app.emailonacid.com/app/acidtest/hMLCNCSKZYHkLgLOpIWltlnYjtagbNsrwzMxalc2VbghN/list",
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 			"notes":null,
-			"notes_by_num":{"1":"Buggy. The first rule inside a media query is not prefixed."}
+			"notes_by_num":{"1":"Buggy. The first rule inside a media query is not prefixed.","2":"Partial. `orientation:portrait` is not supported."}
 		},
 	
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@@ -206,7 +206,7 @@
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 			"test_url":"https://www.caniemail.com/tests/css-media-prefers-color-scheme.html",
 			"test_results_url":"https://app.emailonacid.com/app/acidtest/CBhafIa5yXDRKQKbV442rVFISXim84wMgXaoCqVFD8VTe/list",
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 			"notes_by_num":{"1":"Not supported. `@media (prefers-color-scheme)` is transformed into `@media ( _filtered_a )`.","2":"Not supported. `@media (prefers-color-scheme:dark)` is transformed into `@media none`.","3":"Additional custom `data` attributes (`data-ogsc`, `data-ogac`, `data-ogsb`, `data-ogab`) are added when viewing an email in dark mode. See [this article](https://www.hteumeuleu.com/2021/emails-react-outlook-com-dark-mode/) for examples.","4":"`@media (prefers-color-scheme:dark)` is transformed into `@media all` at run time if it applies.","5":"Not supported. `@media (prefers-color-scheme:dark)` is transformed into `@media (false)`","6":"Not supported. `@media (prefers-color-scheme:dark)` is transformed into `@media ()`"}
 		},
@@ -222,9 +222,9 @@
 			"last_test_date":"2021-02-20",
 			"test_url":"https://www.caniemail.com/tests/css-media-prefers-reduced-motion.html",
 			"test_results_url":"https://testi.at/proj/e3GT3l1CxqBUoE3u9keC4WLf5",
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 			"notes":null,
-			"notes_by_num":{"1":"Not supported. `@media (prefers-reduced-motion:reduce)` is transformed into `@media none`."}
+			"notes_by_num":{"1":"Not supported. `@media (prefers-reduced-motion:reduce)` is transformed into `@media none`.","2":"Partially supported. Not supported on `picture`."}
 		},
 	
 		{
@@ -238,7 +238,7 @@
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 			"test_url":"https://www.caniemail.com/tests/css-media.html",
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 			"description":"Support for border radius logical properties",
 			"url":"https://www.caniemail.com/features/css-border-radius-logical/",
 			"category":"css",
-			"tags":[],
+			"tags":["i18n"],
 			"keywords":"border-start-start-radius, border-start-end-radius, border-end-start-radius, border-end-end-radius",
 			"last_test_date":"2022-08-16",
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@@ -739,6 +739,22 @@
 			"notes_by_num":{"1":"Partial. Not supported with Hotmail/Outlook accounts."}
 		},
 	
+		{
+			"slug":"css-cursor",
+			"title":"cursor",
+			"description":"The cursor CSS property sets the mouse cursor, if any, to show when the mouse pointer is over an element.",
+			"url":"https://www.caniemail.com/features/css-cursor/",
+			"category":"css",
+			"tags":["accessibility"],
+			"keywords":"pointer, mouse, touch",
+			"last_test_date":"2025-07-02",
+			"test_url":"https://www.caniemail.com/tests/css-cursor.html",
+			"test_results_url":"https://testi.at/proj/52gbh94rh6lncdl4fge",
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+			"notes":"Cursor appearance on Android mobile devices depends on external pointer device/mouse. Cursor on iOS mobile devices also requires assistive touch to be enabled, and does not appear to respond to content.",
+			"notes_by_num":{"1":"Partial. URL is not supported.","2":"Cursor property is removed.","3":"iOS assistive touch does not respond to cursor.","4":"Partial. Only supports: crosshair, help, move, pointer, progress, text, wait, auto, default, and all single-direction resize properties.","5":"Partial. URL buggy and only works inline.","6":"Partial. Inline CSS only. Only supports: crosshair, help, move, pointer, wait, auto, default, and all single-direction resize properties."}
+		},
+	
 		{
 			"slug":"css-direction",
 			"title":"direction",
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-			"stats":{"apple-mail":{"macos":{"16.0":"y #1"},"ios":{"17.5.1":"y"}},"gmail":{"desktop-webmail":{"2024-08":"n"},"ios":{"2024-08":"n"},"android":{"2024-08":"n"},"mobile-webmail":{"2024-08":"n"}},"orange":{"desktop-webmail":{"2024-08":"n"},"ios":{"2024-08":"n"},"android":{"2024-08":"u"}},"outlook":{"windows":{"2007":"n","2010":"n","2013":"n","2016":"n","2019":"n"},"windows-mail":{"2024-08":"n"},"macos":{"16.88":"n"},"outlook-com":{"2024-08":"n"},"ios":{"2024-08":"n"},"android":{"2024-08":"u"}},"samsung-email":{"android":{"6.0":"u"}},"sfr":{"desktop-webmail":{"2024-08":"a #2"},"ios":{"2024-08":"a #1 #2"},"android":{"2024-08":"u"}},"thunderbird":{"macos":{"115.10.1":"n","128.1.0":"y"}},"aol":{"desktop-webmail":{"2024-08":"n"},"ios":{"2024-08":"n"},"android":{"2024-08":"u"}},"yahoo":{"desktop-webmail":{"2024-08":"n"},"ios":{"2024-08":"n"},"android":{"2024-08":"u"}},"protonmail":{"desktop-webmail":{"2024-08":"a #2"},"ios":{"2024-08":"y #1"},"android":{"2024-08":"u"}},"hey":{"desktop-webmail":{"2024-08":"a #2"}},"mail-ru":{"desktop-webmail":{"2024-08":"a #2"}},"fastmail":{"desktop-webmail":{"2024-08":"u"}},"laposte":{"desktop-webmail":{"2024-08":"a #2"}},"free-fr":{"desktop-webmail":{"2024-08":"n"}},"t-online-de":{"desktop-webmail":{"2024-08":"a #2"}},"gmx":{"desktop-webmail":{"2024-08":"n"}}},
+			"stats":{"apple-mail":{"macos":{"16.0":"y #1"},"ios":{"17.5.1":"y"}},"gmail":{"desktop-webmail":{"2024-08":"n"},"ios":{"2024-08":"n"},"android":{"2024-08":"n"},"mobile-webmail":{"2024-08":"n"}},"orange":{"desktop-webmail":{"2024-08":"n"},"ios":{"2024-08":"n"},"android":{"2024-08":"u"}},"outlook":{"windows":{"2007":"n","2010":"n","2013":"n","2016":"n","2019":"n"},"windows-mail":{"2024-08":"n"},"macos":{"16.88":"n"},"outlook-com":{"2024-08":"n"},"ios":{"2024-08":"n"},"android":{"2024-08":"u"}},"samsung-email":{"android":{"6.2":"a #3"}},"sfr":{"desktop-webmail":{"2024-08":"a #2"},"ios":{"2024-08":"a #1 #2"},"android":{"2024-08":"u"}},"thunderbird":{"macos":{"115.10.1":"n","128.1.0":"y"}},"aol":{"desktop-webmail":{"2024-08":"n"},"ios":{"2024-08":"n"},"android":{"2024-08":"u"}},"yahoo":{"desktop-webmail":{"2024-08":"n"},"ios":{"2024-08":"n"},"android":{"2024-08":"u"}},"protonmail":{"desktop-webmail":{"2024-08":"a #2"},"ios":{"2024-08":"y #1"},"android":{"2024-08":"u"}},"hey":{"desktop-webmail":{"2024-08":"a #2"}},"mail-ru":{"desktop-webmail":{"2024-08":"a #2"}},"fastmail":{"desktop-webmail":{"2024-08":"u"}},"laposte":{"desktop-webmail":{"2024-08":"a #2"}},"free-fr":{"desktop-webmail":{"2024-08":"n"}},"t-online-de":{"desktop-webmail":{"2024-08":"a #2"}},"gmx":{"desktop-webmail":{"2024-08":"n"}}},
 			"notes":null,
-			"notes_by_num":{"1":"Only supported if you’ve updated your OS with Safari 17.5 or later.","2":"Buggy. The function is supported but the color stays light even in dark mode."}
+			"notes_by_num":{"1":"Only supported if you’ve updated your OS with Safari 17.5 or later.","2":"Buggy. The function is supported but the color stays light even in dark mode.","3":"Partial. Not supported with Hotmail/Outlook accounts."}
 		},
 	
 		{
@@ -1086,7 +1102,7 @@
 			"last_test_date":"2019-09-27",
 			"test_url":"https://www.caniemail.com/tests/css-width-height.html",
 			"test_results_url":"https://app.emailonacid.com/app/acidtest/UhsQmS14DHKFfotKEcCTnWaoAiS24FJMiApZ1OtmHR7vs/list",
-			"stats":{"apple-mail":{"macos":{"12.4":"y"},"ios":{"12.4":"y"}},"gmail":{"desktop-webmail":{"2019-09":"y"},"ios":{"2019-09":"y"},"android":{"2019-09":"y"},"mobile-webmail":{"2020-02":"y"}},"orange":{"desktop-webmail":{"2019-09":"y","2021-03":"y"},"ios":{"2019-09":"y"},"android":{"2019-09":"y"}},"outlook":{"windows":{"2003":"y","2007":"a #2","2010":"a #2","2013":"a #2","2016":"a #2","2019":"a #2"},"windows-mail":{"2019-09":"y"},"macos":{"2011":"y","2016":"y","16.80":"y"},"outlook-com":{"2019-09":"y","2023-12":"y"},"ios":{"2019-09":"y"},"android":{"2019-09":"y"}},"samsung-email":{"android":{"6.0":"y"}},"sfr":{"desktop-webmail":{"2019-09":"y"},"ios":{"2019-09":"y"},"android":{"2019-09":"y"}},"thunderbird":{"macos":{"60.3":"y"}},"aol":{"desktop-webmail":{"2019-09":"y #1"},"ios":{"2019-09":"y #1"},"android":{"2019-09":"y #1"}},"yahoo":{"desktop-webmail":{"2019-09":"n #1"},"ios":{"2019-09":"n #1"},"android":{"2019-09":"n #1"}},"protonmail":{"desktop-webmail":{"2020-03":"y"},"ios":{"2020-03":"y"},"android":{"2020-03":"y"}},"hey":{"desktop-webmail":{"2020-06":"y"}},"mail-ru":{"desktop-webmail":{"2020-10":"y"}},"fastmail":{"desktop-webmail":{"2021-07":"y"}},"laposte":{"desktop-webmail":{"2021-08":"y"}},"gmx":{"desktop-webmail":{"2022-06":"y"},"ios":{"2022-06":"y"},"android":{"2022-06":"y"}},"web-de":{"desktop-webmail":{"2022-06":"y"},"ios":{"2022-06":"y"},"android":{"2022-06":"y"}},"ionos-1and1":{"desktop-webmail":{"2022-06":"y"},"android":{"2022-06":"y"}}},
+			"stats":{"apple-mail":{"macos":{"12.4":"y"},"ios":{"12.4":"y"}},"gmail":{"desktop-webmail":{"2019-09":"y"},"ios":{"2019-09":"y"},"android":{"2019-09":"y"},"mobile-webmail":{"2020-02":"y"}},"orange":{"desktop-webmail":{"2019-09":"y","2021-03":"y"},"ios":{"2019-09":"y"},"android":{"2019-09":"y"}},"outlook":{"windows":{"2003":"y","2007":"a #2","2010":"a #2","2013":"a #2","2016":"a #2","2019":"a #2"},"windows-mail":{"2019-09":"y"},"macos":{"2011":"y","2016":"y","16.80":"y"},"outlook-com":{"2019-09":"y","2023-12":"y"},"ios":{"2019-09":"y"},"android":{"2019-09":"y"}},"samsung-email":{"android":{"6.0":"y"}},"sfr":{"desktop-webmail":{"2019-09":"y"},"ios":{"2019-09":"y"},"android":{"2019-09":"y"}},"thunderbird":{"macos":{"60.3":"y"}},"aol":{"desktop-webmail":{"2019-09":"n #1"},"ios":{"2019-09":"n #1"},"android":{"2019-09":"n #1"}},"yahoo":{"desktop-webmail":{"2019-09":"n #1"},"ios":{"2019-09":"n #1"},"android":{"2019-09":"n #1"}},"protonmail":{"desktop-webmail":{"2020-03":"y"},"ios":{"2020-03":"y"},"android":{"2020-03":"y"}},"hey":{"desktop-webmail":{"2020-06":"y"}},"mail-ru":{"desktop-webmail":{"2020-10":"y"}},"fastmail":{"desktop-webmail":{"2021-07":"y"}},"laposte":{"desktop-webmail":{"2021-08":"y"}},"gmx":{"desktop-webmail":{"2022-06":"y"},"ios":{"2022-06":"y"},"android":{"2022-06":"y"}},"web-de":{"desktop-webmail":{"2022-06":"y"},"ios":{"2022-06":"y"},"android":{"2022-06":"y"}},"ionos-1and1":{"desktop-webmail":{"2022-06":"y"},"android":{"2022-06":"y"}}},
 			"notes":null,
 			"notes_by_num":{"1":"Buggy. Replaces `height` by `min-height`.","2":"Partial. Not supported on `<body>`, `<span>`, `<div>` or `<p>` elements."}
 		},
@@ -1150,9 +1166,9 @@
 			"last_test_date":"2021-11-30",
 			"test_url":"https://www.caniemail.com/tests/css-important.html",
 			"test_results_url":"https://app.emailonacid.com/app/acidtest/JEyxyPfKHFZCPKxlgiOugpH4lyNrXX39cd9M8xaW1DojH/list",
-			"stats":{"apple-mail":{"macos":{"13":"y","15":"y"},"ios":{"15":"y"}},"gmail":{"desktop-webmail":{"2021-11":"a #1"},"ios":{"2021-11":"a #1 #2"},"android":{"2021-11":"a #1 #2"},"mobile-webmail":{"2021-11":"a #1 #2"}},"orange":{"desktop-webmail":{"2021-11":"n #3"},"ios":{"2021-11":"n #3"},"android":{"2021-11":"n #3"}},"outlook":{"windows":{"2007":"a #4 #5","2010":"a #4 #5","2013":"a #4 #5","2016":"a #4 #5","2019":"a #4 #5"},"windows-mail":{"2021-11":"a #4"},"macos":{"16.56":"y","16.80":"y"},"outlook-com":{"2021-11":"y"},"ios":{"2021-11":"y"},"android":{"2021-11":"y"}},"samsung-email":{"android":{"7.0":"y"}},"sfr":{"desktop-webmail":{"2021-11":"y"},"ios":{"2021-11":"a #6"},"android":{"2021-11":"a #6"}},"thunderbird":{"macos":{"91.2.1":"y"}},"aol":{"desktop-webmail":{"2021-11":"a #7"},"ios":{"2021-11":"a #7"},"android":{"2021-11":"a #7"}},"yahoo":{"desktop-webmail":{"2021-11":"a #7"},"ios":{"2021-11":"a #7"},"android":{"2021-11":"a #7"}},"protonmail":{"desktop-webmail":{"2021-11":"a #8"},"ios":{"2021-11":"a #6"},"android":{"2021-11":"a #6"}},"hey":{"desktop-webmail":{"2021-11":"y"}},"mail-ru":{"desktop-webmail":{"2021-11":"y"}},"fastmail":{"desktop-webmail":{"2021-11":"y"}},"laposte":{"desktop-webmail":{"2021-11":"y"}},"gmx":{"desktop-webmail":{"2022-06":"n"},"ios":{"2022-06":"y"},"android":{"2022-06":"y"}},"web-de":{"desktop-webmail":{"2022-06":"n"},"ios":{"2022-06":"y"},"android":{"2022-06":"y"}},"ionos-1and1":{"desktop-webmail":{"2022-06":"y"},"android":{"2022-06":"y"}},"wp-pl":{"desktop-webmail":{"2023-12":"n"}}},
+			"stats":{"apple-mail":{"macos":{"13":"y","15":"y"},"ios":{"15":"y"}},"gmail":{"desktop-webmail":{"2021-11":"a #1"},"ios":{"2021-11":"a #1 #2"},"android":{"2021-11":"a #1 #2"},"mobile-webmail":{"2021-11":"a #1 #2"}},"orange":{"desktop-webmail":{"2021-11":"n #3"},"ios":{"2021-11":"n #3"},"android":{"2021-11":"n #3"}},"outlook":{"windows":{"2007":"a #4 #5","2010":"a #4 #5","2013":"a #4 #5","2016":"a #4 #5","2019":"a #4 #5"},"windows-mail":{"2021-11":"a #4"},"macos":{"16.56":"y","16.80":"y"},"outlook-com":{"2021-11":"y"},"ios":{"2021-11":"y"},"android":{"2021-11":"y"}},"samsung-email":{"android":{"7.0":"y"}},"sfr":{"desktop-webmail":{"2021-11":"y"},"ios":{"2021-11":"a #6"},"android":{"2021-11":"a #6"}},"thunderbird":{"macos":{"91.2.1":"y"}},"aol":{"desktop-webmail":{"2021-11":"a #7"},"ios":{"2021-11":"a #7"},"android":{"2021-11":"a #7"}},"yahoo":{"desktop-webmail":{"2021-11":"a #7"},"ios":{"2021-11":"a #7"},"android":{"2021-11":"a #7"}},"protonmail":{"desktop-webmail":{"2021-11":"a #8"},"ios":{"2021-11":"a #6","2025-08":"a #9"},"android":{"2021-11":"a #6"}},"hey":{"desktop-webmail":{"2021-11":"y"}},"mail-ru":{"desktop-webmail":{"2021-11":"y"}},"fastmail":{"desktop-webmail":{"2021-11":"y"}},"laposte":{"desktop-webmail":{"2021-11":"y"}},"gmx":{"desktop-webmail":{"2022-06":"n"},"ios":{"2022-06":"y"},"android":{"2022-06":"y"}},"web-de":{"desktop-webmail":{"2022-06":"n"},"ios":{"2022-06":"y"},"android":{"2022-06":"y"}},"ionos-1and1":{"desktop-webmail":{"2022-06":"y"},"android":{"2022-06":"y"}},"wp-pl":{"desktop-webmail":{"2023-12":"n"}}},
 			"notes":null,
-			"notes_by_num":{"1":"Partial. Only supported in lowercase. (See [email-bugs#13](https://github.com/hteumeuleu/email-bugs/issues/13))","2":"Partial. Only supported inline when using a Non Gmail Account due to the lack of `<style>` support.","3":"Not supported. The entire declaration is removed if there is no space before `!important`.","4":"Partial. Only supported with a space before.","5":"Partial. Not supported inline. (See [email-bugs#31](https://github.com/hteumeuleu/email-bugs/issues/31))","6":"Partial. Only supported inline due to the lack of `<style>` support.","7":"Partial. Removed if there is no space before when used with a `background-image` property. (See [email-bugs#16](https://github.com/hteumeuleu/email-bugs/issues/16))","8":"Partial. Only supported in lowercase."}
+			"notes_by_num":{"1":"Partial. Only supported in lowercase. (See [email-bugs#13](https://github.com/hteumeuleu/email-bugs/issues/13))","2":"Partial. Only supported inline when using a Non Gmail Account due to the lack of `<style>` support.","3":"Not supported. The entire declaration is removed if there is no space before `!important`.","4":"Partial. Only supported with a space before.","5":"Partial. Not supported inline. (See [email-bugs#31](https://github.com/hteumeuleu/email-bugs/issues/31))","6":"Partial. Only supported inline due to the lack of `<style>` support.","7":"Partial. Removed if there is no space before when used with a `background-image` property. (See [email-bugs#16](https://github.com/hteumeuleu/email-bugs/issues/16))","8":"Partial. Only supported in lowercase.","9":"Partial. Only supported if not written in lowercase."}
 		},
 	
 		{
@@ -1177,8 +1193,8 @@
 			"description":"Shorthand that corresponds to the `top`, `right`, `bottom`, and/or `left` properties",
 			"url":"https://www.caniemail.com/features/css-inset/",
 			"category":"css",
-			"tags":[],
-			"keywords":null,
+			"tags":["i18n"],
+			"keywords":"inset-block, inset-inline, inset-inline-start, inset-inline-end, inset-block-start, inset-block-end",
 			"last_test_date":"2024-05-29",
 			"test_url":"https://www.caniemail.com/tests/css-inset.html",
 			"test_results_url":"https://testi.at/proj/rlpdia3k18jytjx8c2",
@@ -1230,9 +1246,9 @@
 			"last_test_date":"2021-05-16",
 			"test_url":"https://www.caniemail.com/tests/css-positioning.html",
 			"test_results_url":"https://app.emailonacid.com/app/acidtest/E45AW3a9IiIhUSBpv3dc1qPfMiMN8mLepy5BsvqtpXhhy/list",
-			"stats":{"apple-mail":{"macos":{"14":"y"},"ios":{"14.5":"y"}},"gmail":{"desktop-webmail":{"2021-05":"n"},"ios":{"2021-05":"n"},"android":{"2021-05":"n"},"mobile-webmail":{"2021-05":"n"}},"orange":{"desktop-webmail":{"2021-05":"y"},"ios":{"2021-05":"y"},"android":{"2021-05":"y"}},"outlook":{"windows":{"2007":"n","2010":"n","2013":"n","2016":"n","2019":"n"},"windows-mail":{"2021-05":"n"},"macos":{"2011":"y","2016":"y","16.80":"y"},"outlook-com":{"2021-05":"y","2023-12":"y"},"ios":{"2021-05":"y"},"android":{"2021-05":"y"}},"samsung-email":{"android":{"6.0":"y"}},"sfr":{"desktop-webmail":{"2021-05":"y"},"ios":{"2021-05":"y"},"android":{"2021-05":"y"}},"thunderbird":{"macos":{"78.10":"y"}},"aol":{"desktop-webmail":{"2021-05":"n"},"ios":{"2021-05":"n"},"android":{"2021-05":"n"}},"yahoo":{"desktop-webmail":{"2021-05":"n"},"ios":{"2021-05":"n"},"android":{"2021-05":"n"}},"protonmail":{"desktop-webmail":{"2021-05":"y"},"ios":{"2021-05":"y"},"android":{"2021-05":"y"}},"hey":{"desktop-webmail":{"2021-05":"y"}},"mail-ru":{"desktop-webmail":{"2021-05":"a #1"}},"fastmail":{"desktop-webmail":{"2021-07":"y"}},"laposte":{"desktop-webmail":{"2021-08":"y"}},"gmx":{"desktop-webmail":{"2022-06":"y"},"ios":{"2022-06":"y"},"android":{"2022-06":"y"}},"web-de":{"desktop-webmail":{"2022-06":"y"},"ios":{"2022-06":"y"},"android":{"2022-06":"y"}},"ionos-1and1":{"desktop-webmail":{"2022-06":"y"},"android":{"2022-06":"y"}}},
+			"stats":{"apple-mail":{"macos":{"14":"y"},"ios":{"14.5":"y"}},"gmail":{"desktop-webmail":{"2021-05":"n"},"ios":{"2021-05":"n"},"android":{"2021-05":"n"},"mobile-webmail":{"2021-05":"n"}},"orange":{"desktop-webmail":{"2021-05":"y"},"ios":{"2021-05":"y"},"android":{"2021-05":"y"}},"outlook":{"windows":{"2007":"n","2010":"n","2013":"n","2016":"n","2019":"n"},"windows-mail":{"2021-05":"n"},"macos":{"2011":"y","2016":"y","16.80":"y"},"outlook-com":{"2021-05":"y","2023-12":"y"},"ios":{"2021-05":"y"},"android":{"2021-05":"y"}},"samsung-email":{"android":{"6.0":"y","6.2.01.1":"a #2"}},"sfr":{"desktop-webmail":{"2021-05":"y"},"ios":{"2021-05":"y"},"android":{"2021-05":"y"}},"thunderbird":{"macos":{"78.10":"y"}},"aol":{"desktop-webmail":{"2021-05":"n"},"ios":{"2021-05":"n"},"android":{"2021-05":"n"}},"yahoo":{"desktop-webmail":{"2021-05":"n"},"ios":{"2021-05":"n"},"android":{"2021-05":"n"}},"protonmail":{"desktop-webmail":{"2021-05":"y"},"ios":{"2021-05":"y"},"android":{"2021-05":"y"}},"hey":{"desktop-webmail":{"2021-05":"y"}},"mail-ru":{"desktop-webmail":{"2021-05":"a #1"}},"fastmail":{"desktop-webmail":{"2021-07":"y"}},"laposte":{"desktop-webmail":{"2021-08":"y"}},"gmx":{"desktop-webmail":{"2022-06":"y"},"ios":{"2022-06":"y"},"android":{"2022-06":"y"}},"web-de":{"desktop-webmail":{"2022-06":"y"},"ios":{"2022-06":"y"},"android":{"2022-06":"y"}},"ionos-1and1":{"desktop-webmail":{"2022-06":"y"},"android":{"2022-06":"y"}}},
 			"notes":null,
-			"notes_by_num":{"1":"Partial. `left` and `top` are not supported."}
+			"notes_by_num":{"1":"Partial. `left` and `top` are not supported.","2":"Partial. Percentages values are not supported."}
 		},
 	
 		{
@@ -1278,9 +1294,9 @@
 			"last_test_date":"2021-12-29",
 			"test_url":"https://www.caniemail.com/tests/css-gradients.html",
 			"test_results_url":"https://app.emailonacid.com/app/acidtest/8FCYDYSPXot6jquGzeiqGsfoeCU4tvCeRpnVG0z6luNLr/list",
-			"stats":{"apple-mail":{"macos":{"15":"y"},"ios":{"15":"y"}},"gmail":{"desktop-webmail":{"2021-12":"y"},"ios":{"2021-12":"y"},"android":{"2021-12":"y"},"mobile-webmail":{"2021-12":"y"}},"orange":{"desktop-webmail":{"2021-12":"n"},"ios":{"2021-12":"n"},"android":{"2021-12":"n"}},"outlook":{"windows":{"2007":"n #1","2010":"n #1","2013":"n #1","2016":"n #1","2019":"n #1"},"windows-mail":{"2021-12":"n"},"macos":{"16.57":"y","16.80":"n"},"outlook-com":{"2021-12":"n","2023-12":"n"},"ios":{"2.51.1":"y","4.2148.2":"n"},"android":{"4.2147.4":"n"}},"samsung-email":{"android":{"6.0":"y","6.1.90.16":"a #2"}},"sfr":{"desktop-webmail":{"2021-12":"y"},"ios":{"2021-12":"y"},"android":{"2021-12":"y"}},"thunderbird":{"macos":{"91.4.1":"y"}},"aol":{"desktop-webmail":{"2021-12":"n"},"ios":{"2021-12":"n"},"android":{"2021-12":"n"}},"yahoo":{"desktop-webmail":{"2021-12":"n"},"ios":{"2021-12":"n"},"android":{"2021-12":"n"}},"protonmail":{"desktop-webmail":{"2021-12":"y"},"ios":{"2021-12":"y"},"android":{"2021-12":"y"}},"hey":{"desktop-webmail":{"2021-12":"y"}},"mail-ru":{"desktop-webmail":{"2021-12":"y"}},"fastmail":{"desktop-webmail":{"2021-12":"y"}},"laposte":{"desktop-webmail":{"2021-12":"y"}},"t-online-de":{"desktop-webmail":{"2021-12":"y"}},"free-fr":{"desktop-webmail":{"2021-12":"y"}},"gmx":{"desktop-webmail":{"2022-06":"n"},"ios":{"2022-06":"y"},"android":{"2022-06":"y"}},"web-de":{"desktop-webmail":{"2022-06":"n"},"ios":{"2022-06":"y"},"android":{"2022-06":"y"}},"ionos-1and1":{"desktop-webmail":{"2022-06":"y"},"android":{"2022-06":"y"}}},
+			"stats":{"apple-mail":{"macos":{"15":"y"},"ios":{"15":"y"}},"gmail":{"desktop-webmail":{"2021-12":"y"},"ios":{"2021-12":"y"},"android":{"2021-12":"y","2025-04":"a #3"},"mobile-webmail":{"2021-12":"y"}},"orange":{"desktop-webmail":{"2021-12":"n"},"ios":{"2021-12":"n"},"android":{"2021-12":"n"}},"outlook":{"windows":{"2007":"n #1","2010":"n #1","2013":"n #1","2016":"n #1","2019":"n #1"},"windows-mail":{"2021-12":"n"},"macos":{"16.57":"y","16.80":"n"},"outlook-com":{"2021-12":"n","2023-12":"n"},"ios":{"2.51.1":"y","4.2148.2":"n"},"android":{"4.2147.4":"n"}},"samsung-email":{"android":{"6.0":"y","6.1.90.16":"a #2"}},"sfr":{"desktop-webmail":{"2021-12":"y"},"ios":{"2021-12":"y"},"android":{"2021-12":"y"}},"thunderbird":{"macos":{"91.4.1":"y"}},"aol":{"desktop-webmail":{"2021-12":"n"},"ios":{"2021-12":"n"},"android":{"2021-12":"n"}},"yahoo":{"desktop-webmail":{"2021-12":"n"},"ios":{"2021-12":"n"},"android":{"2021-12":"n"}},"protonmail":{"desktop-webmail":{"2021-12":"y"},"ios":{"2021-12":"y"},"android":{"2021-12":"y"}},"hey":{"desktop-webmail":{"2021-12":"y"}},"mail-ru":{"desktop-webmail":{"2021-12":"y"}},"fastmail":{"desktop-webmail":{"2021-12":"y"}},"laposte":{"desktop-webmail":{"2021-12":"y"}},"t-online-de":{"desktop-webmail":{"2021-12":"y"}},"free-fr":{"desktop-webmail":{"2021-12":"y"}},"gmx":{"desktop-webmail":{"2022-06":"n"},"ios":{"2022-06":"y"},"android":{"2022-06":"y"}},"web-de":{"desktop-webmail":{"2022-06":"n"},"ios":{"2022-06":"y"},"android":{"2022-06":"y"}},"ionos-1and1":{"desktop-webmail":{"2022-06":"y"},"android":{"2022-06":"y"}}},
 			"notes":null,
-			"notes_by_num":{"1":"Gradients can be created in VML using `type=\"gradient\"` on a `<v:fill>`. See [VML documentation](https://docs.microsoft.com/en-us/windows/win32/vml/web-workshop---how-to-use-vml-on-web-pages-----fill--element#gradient-fill).","2":"Partial. Not supported with Hotmail/Outlook accounts."}
+			"notes_by_num":{"1":"Gradients can be created in VML using `type=\"gradient\"` on a `<v:fill>`. See [VML documentation](https://docs.microsoft.com/en-us/windows/win32/vml/web-workshop---how-to-use-vml-on-web-pages-----fill--element#gradient-fill).","2":"Partial. Not supported with Hotmail/Outlook accounts.","3":"Buggy. Does not work inline in the `background-image` property. (See [email-bugs#135](https://github.com/hteumeuleu/email-bugs/issues/135))"}
 		},
 	
 		{
@@ -1358,7 +1374,7 @@
 			"last_test_date":"2022-07-13",
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 			"description":"Defines the minimum horizontal or vertical size of an element's block, depending on its writing mode",
 			"url":"https://www.caniemail.com/features/css-min-block-size/",
 			"category":"css",
-			"tags":[],
+			"tags":["i18n"],
 			"keywords":"min, block, size",
 			"last_test_date":"2024-05-31",
 			"test_url":"https://www.caniemail.com/tests/css-min-block-size.html",
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 			"notes":null,
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@@ -1545,12 +1545,12 @@
 			"description":"",
 			"url":"https://www.caniemail.com/features/css-min-inline-size/",
 			"category":"css",
-			"tags":[],
+			"tags":["i18n"],
 			"keywords":"min, inline, size",
 			"last_test_date":"2022-08-30",
 			"test_url":"https://www.caniemail.com/tests/css-min-inline-size.html",
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 			"notes":null,
 			"notes_by_num":null
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@@ -1614,7 +1614,7 @@
 			"last_test_date":"2023-08-31",
 			"test_url":"https://www.caniemail.com/tests/css-nesting.html",
 			"test_results_url":"https://app.emailonacid.com/app/acidtest/8z9ecWkyaSHebmYl0r6dlWFfcia0VNfeKu6s01l5Fw3M0/list",
-			"stats":{"apple-mail":{"macos":{"16.0":"a #1"},"ios":{"16.6":"a #1","17.2":"y"}},"gmail":{"desktop-webmail":{"2023-08":"n"},"ios":{"2023-08":"n"},"android":{"2023-08":"n"},"mobile-webmail":{"2023-08":"n"}},"orange":{"desktop-webmail":{"2023-08":"a #2"},"ios":{"2023-08":"a #2"},"android":{"2023-08":"u"}},"outlook":{"windows":{"2007":"n","2010":"n","2013":"n","2016":"n","2019":"n"},"windows-mail":{"2023-08":"n"},"macos":{"16.78":"a #1","16.80":"n"},"outlook-com":{"2023-08":"n","2024-01":"n"},"ios":{"2023-08":"n"},"android":{"2024-03":"n"}},"samsung-email":{"android":{"6.0":"u","6.1.90.16":"a #4"}},"sfr":{"desktop-webmail":{"2023-08":"a #1 #2"},"ios":{"2023-08":"n"},"android":{"2023-08":"u"}},"thunderbird":{"macos":{"102.15":"n"}},"aol":{"desktop-webmail":{"2024-01":"n #3"},"ios":{"2023-08":"u"},"android":{"2023-08":"u"}},"yahoo":{"desktop-webmail":{"2023-08":"n #3"},"ios":{"2023-08":"n #3"},"android":{"2024-03":"n #3"}},"protonmail":{"desktop-webmail":{"2023-08":"u"},"ios":{"2023-08":"u"},"android":{"2023-08":"u"}},"hey":{"desktop-webmail":{"2023-08":"u"}},"mail-ru":{"desktop-webmail":{"2024-01":"n"}},"fastmail":{"desktop-webmail":{"2023-08":"u"}},"laposte":{"desktop-webmail":{"2023-08":"u"}},"free-fr":{"desktop-webmail":{"2023-08":"u"}},"t-online-de":{"desktop-webmail":{"2023-08":"u"}},"gmx":{"desktop-webmail":{"2021-12":"u"},"ios":{"2021-12":"u"},"android":{"2021-12":"u"}},"web-de":{"desktop-webmail":{"2021-12":"u"},"ios":{"2021-12":"u"},"android":{"2021-12":"u"}},"ionos-1and1":{"desktop-webmail":{"2021-12":"u"},"android":{"2021-12":"u"}}},
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 			"notes":null,
 			"notes_by_num":{"1":"Partial. `E { F {}}` doesn’t work, but `E { & F {}}` does. Full support was added in macOS 14.2.","2":"Buggy. The syntax is supported, but nested selectors are prefixed by the webmail, which might invalidate the selector.","3":"Not supported. The nested selectors are removed, making the nested properties apply to the parent selector.","4":"Partial. Not supported with Hotmail/Outlook accounts."}
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@@ -1662,7 +1662,7 @@
 			"last_test_date":"2019-02-28",
 			"test_url":"https://www.caniemail.com/tests/css-visual-effects.html",
 			"test_results_url":"https://app.emailonacid.com/app/acidtest/DhTRmGsVH6uobU4pHD3CasJywfBL4HnEjA1LOF8f9ctso/list",
-			"stats":{"apple-mail":{"macos":{"12.4":"y"},"ios":{"12.1":"y"}},"gmail":{"desktop-webmail":{"2019-02":"y"},"ios":{"2019-02":"y"},"android":{"2019-02":"y"},"mobile-webmail":{"2020-02":"n"}},"orange":{"desktop-webmail":{"2019-08":"y","2021-03":"n","2024-04":"n"},"ios":{"2019-08":"y","2024-04":"n"},"android":{"2019-08":"y","2024-04":"n"}},"outlook":{"windows":{"2007":"n","2010":"n","2013":"n","2016":"n","2019":"n"},"windows-mail":{"2019-02":"n"},"macos":{"2019-02":"y","16.80":"y"},"outlook-com":{"2019-02":"y","2024-01":"y"},"ios":{"2019-02":"y"},"android":{"2019-02":"y"}},"thunderbird":{"macos":{"60.8":"y"}},"yahoo":{"desktop-webmail":{"2019-02":"n"},"ios":{"2019-02":"n"},"android":{"2019-02":"n"}},"aol":{"desktop-webmail":{"2019-02":"n"},"ios":{"2019-02":"n"},"android":{"2019-02":"n"}},"samsung-email":{"android":{"5.0.10.2":"y"}},"sfr":{"desktop-webmail":{"2019-08":"y"},"ios":{"2019-08":"y"},"android":{"2019-08":"y"}},"protonmail":{"desktop-webmail":{"2020-03":"y"},"ios":{"2020-03":"y"},"android":{"2020-03":"y"}},"hey":{"desktop-webmail":{"2020-06":"y"}},"mail-ru":{"desktop-webmail":{"2020-10":"n"}},"fastmail":{"desktop-webmail":{"2021-07":"y"}},"laposte":{"desktop-webmail":{"2021-08":"y"}},"gmx":{"desktop-webmail":{"2022-06":"n"},"ios":{"2022-06":"y"},"android":{"2022-06":"y"}},"web-de":{"desktop-webmail":{"2022-06":"n"},"ios":{"2022-06":"y"},"android":{"2022-06":"y"}},"ionos-1and1":{"desktop-webmail":{"2022-06":"y"},"android":{"2022-06":"y"}}},
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 			"notes":null,
 			"notes_by_num":null
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@@ -1726,9 +1726,9 @@
 			"last_test_date":"2022-08-03",
 			"test_url":"https://www.caniemail.com/tests/css-overflow-wrap.html",
 			"test_results_url":"https://testi.at/proj/zxOsWrYsJqztvWC7JYF8xrUgn",
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+			"stats":{"apple-mail":{"macos":{"16.0":"a #1"},"ios":{"18.3.2":"a #1"}},"gmail":{"desktop-webmail":{"2022-08":"n"},"ios":{"2022-08":"n"},"android":{"2022-08":"n"},"mobile-webmail":{"2022-08":"u"}},"orange":{"desktop-webmail":{"2022-08":"u"},"ios":{"2022-08":"u"},"android":{"2022-08":"u"}},"outlook":{"windows":{"2007":"n","2010":"n","2013":"n","2016":"n","2019":"n","2021":"n"},"windows-mail":{"2022-08":"n"},"macos":{"2022-08":"y","16.80":"n"},"outlook-com":{"2022-08":"n","2024-01":"n"},"ios":{"2022-08":"n"},"android":{"2022-08":"n"}},"yahoo":{"desktop-webmail":{"2022-08":"n"},"ios":{"2022-08":"n"},"android":{"2022-08":"n"}},"aol":{"desktop-webmail":{"2022-08":"n"},"ios":{"2022-08":"u"},"android":{"2022-08":"u"}},"samsung-email":{"android":{"2022-08":"y"}},"sfr":{"desktop-webmail":{"2022-08":"u"},"ios":{"2022-08":"u"},"android":{"2022-08":"u"}},"protonmail":{"desktop-webmail":{"2022-08":"u"},"ios":{"2022-08":"u"},"android":{"2022-08":"u"}},"hey":{"desktop-webmail":{"2022-08":"u"}},"mail-ru":{"desktop-webmail":{"2022-08":"y"}},"fastmail":{"desktop-webmail":{"2022-08":"u"}}},
 			"notes":null,
-			"notes_by_num":null
+			"notes_by_num":{"1":"Buggy. Requires `word-break:normal` to reset Apple Mail default style (See [issue#394](https://github.com/hteumeuleu/caniemail/issues/394).)"}
 		},
 	
 		{
@@ -1738,11 +1738,11 @@
 			"url":"https://www.caniemail.com/features/css-overflow/",
 			"category":"css",
 			"tags":[],
-			"keywords":null,
-			"last_test_date":"2024-10-02",
+			"keywords":"overflow-block, overflow-inline",
+			"last_test_date":"2025-05-27",
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 			"notes":null,
 			"notes_by_num":{"1":"Partial. Only supported on type selectors.","2":"Not supported. `<input>` elements are transformed into `<noinput>`."}
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@@ -1870,7 +1870,7 @@
 			"last_test_date":"2019-10-16",
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 			"notes":null,
 			"notes_by_num":{"1":"Partial. Only supported on type selectors."}
 		},
@@ -1886,7 +1886,7 @@
 			"last_test_date":"2019-10-16",
 			"test_url":"https://www.caniemail.com/tests/css-selectors-pseudo-classes.html",
 			"test_results_url":"https://app.emailonacid.com/app/acidtest/cl8ZYgIGE372fkVVuJkwNJDd7B4JUpo23Nz6qANcSlRUA/list",
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 			"notes":null,
 			"notes_by_num":{"1":"Partial. Only supported on type selectors."}
 		},
@@ -1902,7 +1902,7 @@
 			"last_test_date":"2019-10-28",
 			"test_url":"https://www.caniemail.com/tests/css-selectors-pseudo-classes.html",
 			"test_results_url":"https://app.emailonacid.com/app/acidtest/cl8ZYgIGE372fkVVuJkwNJDd7B4JUpo23Nz6qANcSlRUA/list",
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 			"notes":null,
 			"notes_by_num":{"1":"Partial. Only supported on type selectors."}
 		},
@@ -1918,7 +1918,7 @@
 			"last_test_date":"2022-03-15",
 			"test_url":"https://www.caniemail.com/tests/css-has.html",
 			"test_results_url":"",
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 			"notes":"As of december 2021, `:has()` is only supported in [Safari Technology Preview 137](https://webkit.org/blog/12156/release-notes-for-safari-technology-preview-137/). As of march 2022, it is supported in Safari 15.4.",
 			"notes_by_num":{"1":"Not supported. `:has(…)` is replaced by `:has`.","2":"Not supported. But the pseudo-class seems interpreted and computed server side."}
 		},
@@ -1934,7 +1934,7 @@
 			"last_test_date":"2019-10-23",
 			"test_url":"https://www.caniemail.com/tests/css-selectors-pseudo-classes.html",
 			"test_results_url":"https://app.emailonacid.com/app/acidtest/cl8ZYgIGE372fkVVuJkwNJDd7B4JUpo23Nz6qANcSlRUA/list",
-			"stats":{"apple-mail":{"macos":{"12.4":"y"},"ios":{"12.1":"y","13.1":"y"}},"gmail":{"desktop-webmail":{"2019-10":"y"},"ios":{"2019-10":"n"},"android":{"2019-10":"a #1"},"mobile-webmail":{"2020-02":"n"}},"orange":{"desktop-webmail":{"2019-10":"y","2021-03":"y"},"ios":{"2019-10":"y"},"android":{"2019-10":"y"}},"outlook":{"windows":{"2007":"n","2010":"n","2013":"n","2016":"n","2019":"n"},"windows-mail":{"2019-10":"n"},"macos":{"2019-02":"y","16.80":"a #2"},"outlook-com":{"2019-10":"a #2","2024-01":"a #2"},"ios":{"2019-10":"n"},"android":{"2019-10":"y"}},"thunderbird":{"macos":{"60.8":"y"}},"yahoo":{"desktop-webmail":{"2019-02":"y"},"ios":{"2019-02":"y"},"android":{"2019-02":"y"}},"aol":{"desktop-webmail":{"2019-02":"y"},"ios":{"2019-02":"n"},"android":{"2019-02":"y"}},"samsung-email":{"android":{"5.0.10.2":"y","6.0.04.6":"y"}},"sfr":{"desktop-webmail":{"2020-01":"y"},"ios":{"2020-01":"n"},"android":{"2020-01":"n"}},"protonmail":{"desktop-webmail":{"2020-03":"n"},"ios":{"2020-03":"n"},"android":{"2020-03":"y"}},"hey":{"desktop-webmail":{"2020-06":"y"}},"mail-ru":{"desktop-webmail":{"2020-10":"n"}},"fastmail":{"desktop-webmail":{"2021-07":"y"}},"laposte":{"desktop-webmail":{"2021-08":"y"}},"gmx":{"desktop-webmail":{"2022-07":"n"},"ios":{"2022-07":"y"},"android":{"2022-07":"y"}},"web-de":{"desktop-webmail":{"2022-07":"n"},"ios":{"2022-07":"y"},"android":{"2022-07":"y"}},"ionos-1and1":{"desktop-webmail":{"2022-07":"y"},"android":{"2022-07":"y"}}},
+			"stats":{"apple-mail":{"macos":{"12.4":"y"},"ios":{"12.1":"y","13.1":"y"}},"gmail":{"desktop-webmail":{"2019-10":"y"},"ios":{"2019-10":"n"},"android":{"2019-10":"a #1"},"mobile-webmail":{"2020-02":"n"}},"orange":{"desktop-webmail":{"2019-10":"y","2021-03":"y"},"ios":{"2019-10":"y"},"android":{"2019-10":"y"}},"outlook":{"windows":{"2007":"n","2010":"n","2013":"n","2016":"n","2019":"n"},"windows-mail":{"2019-10":"n"},"macos":{"2019-02":"y","16.80":"a #2"},"outlook-com":{"2019-10":"a #2","2024-01":"a #2"},"ios":{"2019-10":"n"},"android":{"2019-10":"y"}},"thunderbird":{"macos":{"60.8":"y"}},"yahoo":{"desktop-webmail":{"2019-02":"y"},"ios":{"2019-02":"y"},"android":{"2019-02":"y"}},"aol":{"desktop-webmail":{"2019-02":"y"},"ios":{"2019-02":"n"},"android":{"2019-02":"y"}},"samsung-email":{"android":{"5.0.10.2":"y","6.0.04.6":"y"}},"sfr":{"desktop-webmail":{"2020-01":"y","2025-07":"n"},"ios":{"2020-01":"n"},"android":{"2020-01":"n"}},"protonmail":{"desktop-webmail":{"2020-03":"y"},"ios":{"2020-03":"y"},"android":{"2020-03":"y"}},"hey":{"desktop-webmail":{"2020-06":"y"}},"mail-ru":{"desktop-webmail":{"2020-10":"n"}},"fastmail":{"desktop-webmail":{"2021-07":"y"}},"laposte":{"desktop-webmail":{"2021-08":"y","2025-07":"n"}},"gmx":{"desktop-webmail":{"2022-07":"n"},"ios":{"2022-07":"y"},"android":{"2022-07":"y"}},"web-de":{"desktop-webmail":{"2022-07":"n"},"ios":{"2022-07":"y"},"android":{"2022-07":"y"}},"ionos-1and1":{"desktop-webmail":{"2022-07":"y"},"android":{"2022-07":"y"}}},
 			"notes":null,
 			"notes_by_num":{"1":"Partial. Not supported with non Google accounts.","2":"Partial. Only supported on type selectors."}
 		},
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@@ -2222,7 +2222,7 @@
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 			"test_url":"https://www.caniemail.com/tests/css-pseudo-elements.html",
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 			"notes":null,
 			"notes_by_num":{"1":"Not supported with non Outlook accounts.","2":"The pseudo-element is supported but `<input>` elements are not.","3":"Partial. Only supported on type selectors."}
 		},
@@ -2254,9 +2254,9 @@
 			"last_test_date":"2021-12-29",
 			"test_url":"https://www.caniemail.com/tests/css-gradients.html",
 			"test_results_url":"https://app.emailonacid.com/app/acidtest/8FCYDYSPXot6jquGzeiqGsfoeCU4tvCeRpnVG0z6luNLr/list",
-			"stats":{"apple-mail":{"macos":{"15":"y"},"ios":{"15":"y"}},"gmail":{"desktop-webmail":{"2021-12":"y"},"ios":{"2021-12":"y"},"android":{"2021-12":"y"},"mobile-webmail":{"2021-12":"y"}},"orange":{"desktop-webmail":{"2021-12":"y"},"ios":{"2021-12":"y"},"android":{"2021-12":"y"}},"outlook":{"windows":{"2007":"n #1","2010":"n #1","2013":"n #1","2016":"n #1","2019":"n #1"},"windows-mail":{"2021-12":"n"},"macos":{"16.57":"y","16.80":"n"},"outlook-com":{"2021-12":"n","2024-01":"n"},"ios":{"2.51.1":"y","4.2148.2":"n"},"android":{"4.2147.4":"n"}},"samsung-email":{"android":{"6.0":"y"}},"sfr":{"desktop-webmail":{"2021-12":"y"},"ios":{"2021-12":"y"},"android":{"2021-12":"y"}},"thunderbird":{"macos":{"91.4.1":"y"}},"aol":{"desktop-webmail":{"2021-12":"n"},"ios":{"2021-12":"n"},"android":{"2021-12":"n"}},"yahoo":{"desktop-webmail":{"2021-12":"n"},"ios":{"2021-12":"n"},"android":{"2021-12":"n"}},"protonmail":{"desktop-webmail":{"2021-12":"y"},"ios":{"2021-12":"y"},"android":{"2021-12":"y"}},"hey":{"desktop-webmail":{"2021-12":"y"}},"mail-ru":{"desktop-webmail":{"2021-12":"y"}},"fastmail":{"desktop-webmail":{"2021-12":"y"}},"laposte":{"desktop-webmail":{"2021-12":"y"}},"t-online-de":{"desktop-webmail":{"2021-12":"y"}},"free-fr":{"desktop-webmail":{"2021-12":"y"}},"gmx":{"desktop-webmail":{"2022-07":"n"},"ios":{"2022-07":"y"},"android":{"2022-07":"y"}},"web-de":{"desktop-webmail":{"2022-07":"n"},"ios":{"2022-07":"y"},"android":{"2022-07":"y"}},"ionos-1and1":{"desktop-webmail":{"2022-07":"y"},"android":{"2022-07":"y"}}},
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 			"notes":null,
-			"notes_by_num":{"1":"Gradients can be created in VML using `type=\"gradientRadial\"` on a `<v:fill>`. See [VML documentation](https://docs.microsoft.com/en-us/windows/win32/vml/web-workshop---how-to-use-vml-on-web-pages-----fill--element#gradient-fill)."}
+			"notes_by_num":{"1":"Gradients can be created in VML using `type=\"gradientRadial\"` on a `<v:fill>`. See [VML documentation](https://docs.microsoft.com/en-us/windows/win32/vml/web-workshop---how-to-use-vml-on-web-pages-----fill--element#gradient-fill).","2":"Buggy. Does not work inline in the `background-image` property. (See [email-bugs#135](https://github.com/hteumeuleu/email-bugs/issues/135))"}
 		},
 	
 		{
@@ -2366,7 +2366,7 @@
 			"last_test_date":"2019-10-13",
 			"test_url":"https://www.caniemail.com/tests/css-selectors.html",
 			"test_results_url":"https://app.emailonacid.com/app/acidtest/kQbnzGXMSxMg2NDGmrcxIXOHrROwokTB29RcSssnkoPlS/list",
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 			"notes":null,
 			"notes_by_num":{"1":"Partial. Not supported with non Google accounts.","2":"Buggy. The first `<head>` in the HTML is removed, so `<style>` elements need to be in a second `<head>` element.","3":"Buggy. Styles will be applied to the first selector of the chain.","4":"Buggy. Only the first selector of the chain is prefixed in the styles, but all classes are prefixed in the HTML.","5":"Partial. Only when used as class or ID selectors"}
 		},
@@ -2382,7 +2382,7 @@
 			"last_test_date":"2019-10-13",
 			"test_url":"https://www.caniemail.com/tests/css-selectors.html",
 			"test_results_url":"https://app.emailonacid.com/app/acidtest/kQbnzGXMSxMg2NDGmrcxIXOHrROwokTB29RcSssnkoPlS/list",
-			"stats":{"apple-mail":{"macos":{"12.4":"y"},"ios":{"13.1":"y"}},"gmail":{"desktop-webmail":{"2019-10":"y"},"ios":{"2019-10":"a #1"},"android":{"2019-10":"a #1"},"mobile-webmail":{"2020-02":"n"}},"orange":{"desktop-webmail":{"2019-10":"y","2021-03":"n"},"ios":{"2019-10":"y"},"android":{"2019-10":"y"}},"outlook":{"windows":{"2003":"y","2007":"n","2010":"n","2013":"n","2016":"n","2019":"n"},"windows-mail":{"2023-06":"n"},"macos":{"2011":"y","2016":"y","16.80":"y"},"outlook-com":{"2019-10":"y","2024-01":"y"},"ios":{"2019-10":"y"},"android":{"2019-10":"y"}},"samsung-email":{"android":{"6.0":"y"}},"sfr":{"desktop-webmail":{"2019-10":"y"},"ios":{"2019-10":"n"},"android":{"2019-10":"n"}},"thunderbird":{"macos":{"60.3":"y"}},"aol":{"desktop-webmail":{"2019-10":"y"},"ios":{"2019-10":"y"},"android":{"2019-10":"y"}},"yahoo":{"desktop-webmail":{"2019-10":"y"},"ios":{"2019-10":"y"},"android":{"2019-10":"a #2"}},"protonmail":{"desktop-webmail":{"2020-03":"n"},"ios":{"2020-03":"n"},"android":{"2020-03":"y"}},"hey":{"desktop-webmail":{"2020-06":"y"}},"mail-ru":{"desktop-webmail":{"2020-10":"y"}},"fastmail":{"desktop-webmail":{"2021-07":"y"}},"laposte":{"desktop-webmail":{"2021-08":"y"}},"gmx":{"desktop-webmail":{"2022-06":"n"},"ios":{"2022-06":"y"},"android":{"2022-06":"y"}},"web-de":{"desktop-webmail":{"2022-06":"n"},"ios":{"2022-06":"y"},"android":{"2022-06":"y"}},"ionos-1and1":{"desktop-webmail":{"2022-06":"y"},"android":{"2022-06":"y"}}},
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 			"notes":null,
 			"notes_by_num":{"1":"Partial. Not supported with non Google accounts.","2":"Buggy. The first `<head>` in the HTML is removed, so `<style>` elements need to be in a second `<head>` element."}
 		},
@@ -2398,7 +2398,7 @@
 			"last_test_date":"2019-10-13",
 			"test_url":"https://www.caniemail.com/tests/css-selectors.html",
 			"test_results_url":"https://app.emailonacid.com/app/acidtest/kQbnzGXMSxMg2NDGmrcxIXOHrROwokTB29RcSssnkoPlS/list",
-			"stats":{"apple-mail":{"macos":{"12.4":"y"},"ios":{"13.1":"y"}},"gmail":{"desktop-webmail":{"2019-10":"y"},"ios":{"2019-10":"a #1"},"android":{"2019-10":"a #1"},"mobile-webmail":{"2020-02":"n"}},"orange":{"desktop-webmail":{"2019-10":"y","2021-03":"y"},"ios":{"2019-10":"y"},"android":{"2019-10":"y"}},"outlook":{"windows":{"2003":"y","2007":"y","2010":"y","2013":"y","2016":"y","2019":"y"},"windows-mail":{"2019-10":"y"},"macos":{"2011":"y","2016":"y","16.80":"y"},"outlook-com":{"2019-10":"y","2024-01":"y"},"ios":{"2019-10":"y"},"android":{"2019-10":"y"}},"samsung-email":{"android":{"6.0":"y"}},"sfr":{"desktop-webmail":{"2019-10":"y"},"ios":{"2019-10":"n"},"android":{"2019-10":"n"}},"thunderbird":{"macos":{"60.3":"y"}},"aol":{"desktop-webmail":{"2019-10":"y"},"ios":{"2019-10":"y"},"android":{"2019-10":"y"}},"yahoo":{"desktop-webmail":{"2019-10":"y"},"ios":{"2019-10":"y"},"android":{"2019-10":"a #2"}},"protonmail":{"desktop-webmail":{"2020-03":"n"},"ios":{"2020-03":"n"},"android":{"2020-03":"y"}},"hey":{"desktop-webmail":{"2020-06":"y"}},"mail-ru":{"desktop-webmail":{"2020-10":"y"}},"fastmail":{"desktop-webmail":{"2021-07":"y"}},"laposte":{"desktop-webmail":{"2021-08":"y"}},"gmx":{"desktop-webmail":{"2022-06":"y"},"ios":{"2022-06":"y"},"android":{"2022-06":"y"}},"web-de":{"desktop-webmail":{"2022-06":"y"},"ios":{"2022-06":"y"},"android":{"2022-06":"y"}},"ionos-1and1":{"desktop-webmail":{"2022-06":"y"},"android":{"2022-06":"y"}}},
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 			"notes":null,
 			"notes_by_num":{"1":"Partial. Not supported with non Google accounts.","2":"Buggy. The first `<head>` in the HTML is removed, so `<style>` elements need to be in a second `<head>` element."}
 		},
@@ -2414,7 +2414,7 @@
 			"last_test_date":"2019-10-13",
 			"test_url":"https://www.caniemail.com/tests/css-selectors.html",
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 			"notes":null,
 			"notes_by_num":{"1":"Partial. `sideways` is not supported"}
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@@ -2814,7 +2814,7 @@
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@@ -2862,7 +2862,7 @@
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 			"test_url":"https://www.caniemail.com/tests/css-text-underline-position.html",
 			"test_results_url":"https://testi.at/proj/yd99u8e12nvh97jcv",
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 			"notes":null,
 			"notes_by_num":{"1":"Partial. Supports `under` but not `right` and `left`"}
 		},
@@ -3246,7 +3246,7 @@
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 			"notes":null,
 			"notes_by_num":{"1":"Buggy. `visibility:collapse` applied to a `<tr>` only hides content and does not \"remove\" it from layout.","2":"Partially supported. `visibility:collapse` is not supported."}
 		},
@@ -3342,11 +3342,27 @@
 			"last_test_date":"2024-03-13",
 			"test_url":"https://www.caniemail.com/tests/css-word-spacing.html",
 			"test_results_url":"https://testi.at/proj/8r8pfrlvcxklca32ij",
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 			"notes":null,
 			"notes_by_num":{"1":"Does not support `rem` and `ch` values."}
 		},
 	
+		{
+			"slug":"css-word-wrap",
+			"title":"word-wrap",
+			"description":"The word-wrap CSS property (now standardized as overflow-wrap) controls whether the browser should break words to prevent them from overflowing their container. When set to break-word, it forces otherwise unbreakable strings to wrap onto the next line to avoid layout issues.",
+			"url":"https://www.caniemail.com/features/css-word-wrap/",
+			"category":"css",
+			"tags":[],
+			"keywords":"word-wrap, word-break, overflow-wrap",
+			"last_test_date":"2025-05-08",
+			"test_url":"https://www.caniemail.com/tests/css-word-wrap.html",
+			"test_results_url":"https://app.emailonacid.com/app/acidtest/vCaPUwbCjmYsdRJi38QdpqJSetV5X7wBQh5iymp8t1Sty/list",
+			"stats":{"apple-mail":{"macos":{"16":"y"},"ios":{"16":"y"}},"gmail":{"desktop-webmail":{"2025-05":"a #1"},"android":{"2025-05":"a #1"}},"outlook":{"windows":{"2016":"n #2","2019":"n #2","2021":"n #2"},"windows-mail":{"2025-05":"n"},"outlook-com":{"2022-05":"y #3"},"ios":{"2025-05":"y #3"},"android":{"2025-05":"n"}},"yahoo":{"desktop-webmail":{"2025-05":"y"}}},
+			"notes":null,
+			"notes_by_num":{"1":"Applies `word-wrap: break-word` to all items.","2":"Does not honor any wrapping, including `word-wrap`, `overflow-wrap`, and `word-break`. Using an equivalent MSO breakdown (`-ms-word-break: break-all` and `mso-hyphenate: none` together) does not work.","3":"Supports both `word-wrap` and equivalent MSO breakdown (`-ms-word-break: break-all` and `mso-hyphenate: none` together)"}
+		},
+	
 		{
 			"slug":"css-writing-mode",
 			"title":"writing-mode",
@@ -3385,7 +3401,7 @@
 			"description":"Represents an abbreviation or acronym.",
 			"url":"https://www.caniemail.com/features/html-abbr/",
 			"category":"html",
-			"tags":[],
+			"tags":["accessibility"],
 			"keywords":null,
 			"last_test_date":"2023-09-13",
 			"test_url":"https://www.caniemail.com/tests/html-abbr.html",
@@ -3406,7 +3422,7 @@
 			"last_test_date":"2024-01-03",
 			"test_url":"https://www.caniemail.com/tests/html-acronym.html",
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 			"notes_by_num":{"1":"Buggy. `title` attribute is removed but keeps `<acronym>` tag."}
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 			"description":"A short fragment of computer code.",
 			"url":"https://www.caniemail.com/features/html-code/",
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-			"tags":[],
+			"tags":["accessibility"],
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 			"last_test_date":"2023-04-25",
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 			"description":"HTML horizontal rule",
 			"url":"https://www.caniemail.com/features/html-hr/",
 			"category":"html",
-			"tags":[],
+			"tags":["accessibility"],
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 			"description":"Displays an image into the document",
 			"url":"https://www.caniemail.com/features/html-img/",
 			"category":"html",
-			"tags":[],
+			"tags":["performance","accessibility"],
 			"keywords":null,
 			"last_test_date":"2023-12-16",
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 			"keywords":null,
 			"last_test_date":"2023-07-27",
 			"test_url":"https://www.caniemail.com/tests/html-style.html",
-			"test_results_url":"https://app.emailonacid.com/app/acidtest/od5IYQtx8yIbIUbeRyQXnP0yzFKEm2E9CKa3FU4BcEXFv/list",
-			"stats":{"apple-mail":{"macos":{"10.3":"y","16.0":"y"},"ios":{"10.3":"y","12.3":"y","16.2":"y"}},"gmail":{"desktop-webmail":{"2019-06":"a #1","2023-01":"a #1"},"ios":{"2019-06":"a #1 #2","2023-01":"a #1 #2"},"android":{"2019-06":"a #1 #2"},"mobile-webmail":{"2020-02":"n","2023-01":"n"}},"orange":{"desktop-webmail":{"2019-06":"y","2021-03":"y","2023-02":"y"},"ios":{"2019-06":"y","2023-02":"y"},"android":{"2019-06":"n","2019-08":"y","2023-02":"y"}},"outlook":{"windows":{"2003":"y","2007":"a #4","2010":"a #4","2013":"a #4","2016":"a #4","2019":"a #4"},"windows-mail":{"2020-01":"a #4","2023-01":"a #4"},"macos":{"2011":"y","2016":"y","2019":"y","2021":"y","16.80":"y"},"outlook-com":{"2019-06":"y","2023-01":"y","2024-01":"y"},"ios":{"2019-06":"y","2023-01":"y"},"android":{"2019-06":"y"}},"samsung-email":{"android":{"5.0.10.2":"y","6.0":"y"}},"sfr":{"desktop-webmail":{"2019-06":"y","2023-02":"y"},"ios":{"2019-06":"n","2023-02":"n"},"android":{"2019-06":"n","2023-02":"n"}},"thunderbird":{"macos":{"60.3":"y","102.7":"y"},"windows":{"102.7":"y"}},"aol":{"desktop-webmail":{"2020-01":"y","2023-01":"y"},"ios":{"2020-01":"y","2023-01":"y"},"android":{"2020-01":"y"}},"yahoo":{"desktop-webmail":{"2019-06":"y #5","2023-01":"y"},"ios":{"2019-06":"y","2023-01":"y"},"android":{"2019-06":"a #3","2023-01":"a #3"}},"protonmail":{"desktop-webmail":{"2020-03":"n","2022-02":"y","2023-01":"y"},"ios":{"2020-03":"n","2023-01":"a #1"},"android":{"2020-03":"a #1"}},"hey":{"desktop-webmail":{"2020-06":"y"}},"mail-ru":{"desktop-webmail":{"2020-09":"y"}},"fastmail":{"desktop-webmail":{"2021-07":"y"}},"laposte":{"desktop-webmail":{"2021-08":"y"},"ios":{"2023-02":"n"},"android":{"2023-02":"n"}},"gmx":{"desktop-webmail":{"2022-11":"y","2023-07":"n"},"ios":{"2022-11":"y"},"android":{"2022-11":"y"}},"web-de":{"desktop-webmail":{"2022-11":"y"},"ios":{"2022-11":"y"},"android":{"2022-11":"y"}},"ionos-1and1":{"desktop-webmail":{"2022-11":"y"},"android":{"2022-11":"y"}},"rainloop":{"desktop-webmail":{"2023-02":"n"}},"wp-pl":{"desktop-webmail":{"2023-12":"y"}}},
+			"test_results_url":"https://app.emailonacid.com/app/acidtest/CAMb612bxbVwRWPhM4wZKNhhdcdkNxj0Rj6dtRRw6LQUO/list",
+			"stats":{"apple-mail":{"macos":{"10.3":"y","16.0":"y"},"ios":{"10.3":"y","12.3":"y","16.2":"y"}},"gmail":{"desktop-webmail":{"2019-06":"a #1","2023-01":"a #1 #6"},"ios":{"2019-06":"a #1 #2","2023-01":"a #1 #2"},"android":{"2019-06":"a #1 #2"},"mobile-webmail":{"2020-02":"n","2023-01":"n"}},"orange":{"desktop-webmail":{"2019-06":"y","2021-03":"y","2023-02":"y"},"ios":{"2019-06":"y","2023-02":"y"},"android":{"2019-06":"n","2019-08":"y","2023-02":"y"}},"outlook":{"windows":{"2003":"y","2007":"a #4","2010":"a #4","2013":"a #4","2016":"a #4","2019":"a #4"},"windows-mail":{"2020-01":"a #4","2023-01":"a #4"},"macos":{"2011":"y","2016":"y","2019":"y","2021":"y","16.80":"y"},"outlook-com":{"2019-06":"y","2023-01":"y","2024-01":"y"},"ios":{"2019-06":"y","2023-01":"y"},"android":{"2019-06":"y"}},"samsung-email":{"android":{"5.0.10.2":"y","6.0":"y"}},"sfr":{"desktop-webmail":{"2019-06":"y","2023-02":"y","2025-07":"n"},"ios":{"2019-06":"n","2023-02":"n","2025-07":"n"},"android":{"2019-06":"n","2023-02":"n"}},"thunderbird":{"macos":{"60.3":"y","102.7":"y"},"windows":{"102.7":"y"}},"aol":{"desktop-webmail":{"2020-01":"y","2023-01":"y"},"ios":{"2020-01":"y","2023-01":"y"},"android":{"2020-01":"y"}},"yahoo":{"desktop-webmail":{"2019-06":"y #5","2023-01":"y"},"ios":{"2019-06":"y","2023-01":"y"},"android":{"2019-06":"a #3","2023-01":"a #3","2025-06":"y"}},"protonmail":{"desktop-webmail":{"2020-03":"n","2022-02":"y","2023-01":"y"},"ios":{"2020-03":"n","2023-01":"a #1"},"android":{"2020-03":"a #1"}},"hey":{"desktop-webmail":{"2020-06":"y"}},"mail-ru":{"desktop-webmail":{"2020-09":"y"}},"fastmail":{"desktop-webmail":{"2021-07":"y"}},"laposte":{"desktop-webmail":{"2021-08":"y","2025-07":"n"},"ios":{"2023-02":"n","2025-07":"n"},"android":{"2023-02":"n"}},"gmx":{"desktop-webmail":{"2022-11":"y","2023-07":"n"},"ios":{"2022-11":"y"},"android":{"2022-11":"y"}},"web-de":{"desktop-webmail":{"2022-11":"y","2025-04":"n"},"ios":{"2022-11":"y"},"android":{"2022-11":"y"}},"ionos-1and1":{"desktop-webmail":{"2022-11":"y"},"android":{"2022-11":"y"}},"rainloop":{"desktop-webmail":{"2023-02":"n"}},"wp-pl":{"desktop-webmail":{"2023-12":"y"}}},
 			"notes":"",
-			"notes_by_num":{"1":"Partial. Not supported inside the `<body>`.","2":"Partial. Not supported with non Google accounts.","3":"Buggy. The first `<head>` in the HTML is removed, so `<style>` elements need to be in a second `<head>` element.","4":"Buggy. `<style>` elements need to be declared before their rules are used.","5":"A CSS rule following a CSS comment is ignored. (See [email-bugs#25](https://github.com/hteumeuleu/email-bugs/issues/25).)"}
+			"notes_by_num":{"1":"Partial. Not supported inside the `<body>`.","2":"Partial. Not supported with non Google accounts.","3":"Buggy. The first `<head>` in the HTML is removed, so `<style>` elements need to be in a second `<head>` element.","4":"Buggy. `<style>` elements need to be declared before their rules are used.","5":"A CSS rule following a CSS comment is ignored. (See [email-bugs#25](https://github.com/hteumeuleu/email-bugs/issues/25).)","6":"The size of the `<style>` tag [is limited to 16 KB](https://github.com/hteumeuleu/email-bugs/issues/90)"}
 		},
 	
 		{

internal/htmlcheck/config.go

@@ -38,167 +38,178 @@ var htmlTests = map[string]string{
 
 // Image tests using regex to match against img[src]
 var imageRegexpTests = map[string]*regexp.Regexp{
-	"image-apng":   regexp.MustCompile(`(?i)\.apng$`),       // 78.723404
-	"image-avif":   regexp.MustCompile(`(?i)\.avif$`),       // 14.864864
-	"image-base64": regexp.MustCompile(`^(?i)data:image\/`), // 61.702126
-	"image-bmp":    regexp.MustCompile(`(?i)\.bmp$`),        // 89.3617
-	"image-gif":    regexp.MustCompile(`(?i)\.gif$`),        // 89.3617
-	"image-hdr":    regexp.MustCompile(`(?i)\.hdr$`),        // 12.5
-	"image-heif":   regexp.MustCompile(`(?i)\.heif$`),       // 0
-	"image-ico":    regexp.MustCompile(`(?i)\.ico$`),        // 87.23404
-	"image-mp4":    regexp.MustCompile(`(?i)\.mp4$`),        // 26.53061
-	"image-ppm":    regexp.MustCompile(`(?i)\.ppm$`),        // 2.0833282
-	"image-svg":    regexp.MustCompile(`(?i)\.svg$`),        // 64.91228
-	"image-tiff":   regexp.MustCompile(`(?i)\.tiff?$`),      // 38.29787
-	"image-webp":   regexp.MustCompile(`(?i)\.webp$`),       // 59.649124
+	"image-apng":   regexp.MustCompile(`(?i)\.apng$`),
+	"image-avif":   regexp.MustCompile(`(?i)\.avif$`),
+	"image-base64": regexp.MustCompile(`^(?i)data:image\/`),
+	"image-bmp":    regexp.MustCompile(`(?i)\.bmp$`),
+	"image-gif":    regexp.MustCompile(`(?i)\.gif$`),
+	"image-hdr":    regexp.MustCompile(`(?i)\.hdr$`),
+	"image-heif":   regexp.MustCompile(`(?i)\.heif$`),
+	"image-ico":    regexp.MustCompile(`(?i)\.ico$`),
+	"image-mp4":    regexp.MustCompile(`(?i)\.mp4$`),
+	"image-ppm":    regexp.MustCompile(`(?i)\.ppm$`),
+	"image-svg":    regexp.MustCompile(`(?i)\.svg$`),
+	"image-tiff":   regexp.MustCompile(`(?i)\.tiff?$`),
+	"image-webp":   regexp.MustCompile(`(?i)\.webp$`),
 }
 
-var cssInlineTests = map[string]string{
-	"css-accent-color":                   "[style*=\"accent-color:\"]",                                           // 6.6666718
-	"css-align-items":                    "[style*=\"align-items:\"]",                                            // 60.784313
-	"css-aspect-ratio":                   "[style*=\"aspect-ratio:\"]",                                           // 30
-	"css-background-blend-mode":          "[style*=\"background-blend-mode:\"]",                                  // 61.70213
-	"css-background-clip":                "[style*=\"background-clip:\"]",                                        // 61.70213
-	"css-background-color":               "[style*=\"background-color:\"], [bgcolor]",                            // 90
-	"css-background-image":               "[style*=\"background-image:\"]",                                       // 57.62712
-	"css-background-origin":              "[style*=\"background-origin:\"]",                                      // 61.70213
-	"css-background-position":            "[style*=\"background-position:\"]",                                    // 61.224487
-	"css-background-repeat":              "[style*=\"background-repeat:\"]",                                      // 67.34694
-	"css-background-size":                "[style*=\"background-size:\"]",                                        // 61.702126
-	"css-background":                     "[style*=\"background:\"], [background]",                               // 57.407406
-	"css-block-inline-size":              "[style*=\"block-inline-size:\"]",                                      // 46.93877
-	"css-border-image":                   "[style*=\"border-image:\"]",                                           // 52.173912
-	"css-border-inline-block-individual": "[style*=\"border-inline:\"]",                                          // 18.518517
-	"css-border-radius":                  "[style*=\"border-radius:\"]",                                          // 67.34694
-	"css-border":                         "[style*=\"border:\"], [border]",                                       // 86.95652
-	"css-box-shadow":                     "[style*=\"box-shadow:\"]",                                             // 43.103447
-	"css-box-sizing":                     "[style*=\"box-sizing:\"]",                                             // 71.739136
-	"css-caption-side":                   "[style*=\"caption-side:\"]",                                           // 84
-	"css-clip-path":                      "[style*=\"clip-path:\"]",                                              // 43.396225
-	"css-column-count":                   "[style*=\"column-count:\"]",                                           // 67.391304
-	"css-column-layout-properties":       "[style*=\"column-layout-properties:\"]",                               // 47.368423
-	"css-conic-gradient":                 "[style*=\"conic-gradient:\"]",                                         // 38.461536
-	"css-direction":                      "[style*=\"direction:\"]",                                              // 97.77778
-	"css-display-flex":                   "[style*=\"display:flex\"]",                                            // 53.448277
-	"css-display-grid":                   "[style*=\"display:grid\"]",                                            // 54.347824
-	"css-display-none":                   "[style*=\"display:none\"]",                                            // 84.78261
-	"css-display":                        "[style*=\"display:\"]",                                                // 55.555553
-	"css-filter":                         "[style*=\"filter:\"]",                                                 // 50
-	"css-flex-direction":                 "[style*=\"flex-direction:\"]",                                         // 50
-	"css-flex-wrap":                      "[style*=\"flex-wrap:\"]",                                              // 49.09091
-	"css-float":                          "[style*=\"float:\"]",                                                  // 85.10638
-	"css-font-kerning":                   "[style*=\"font-kerning:\"]",                                           // 66.666664
-	"css-font-weight":                    "[style*=\"font-weight:\"]",                                            // 76.666664
-	"css-font":                           "[style*=\"font:\"]",                                                   // 95.833336
-	"css-gap":                            "[style*=\"gap:\"]",                                                    // 40
-	"css-grid-template":                  "[style*=\"grid-template:\"]",                                          // 34.042553
-	"css-height":                         "[style*=\"height:\"], [height]",                                       // 77.08333
-	"css-hyphens":                        "[style*=\"hyphens:\"]",                                                // 31.111107
-	"css-important":                      "[style*=\"!important\"]",                                              // 43.478264
-	"css-inline-size":                    "[style*=\"inline-size:\"]",                                            // 43.478264
-	"css-intrinsic-size":                 "[style*=\"intrinsic-size:\"]",                                         // 40.54054
-	"css-justify-content":                "[style*=\"justify-content:\"]",                                        // 59.25926
-	"css-letter-spacing":                 "[style*=\"letter-spacing:\"]",                                         // 87.23404
-	"css-line-height":                    "[style*=\"line-height:\"]",                                            // 82.608696
-	"css-list-style-image":               "[style*=\"list-style-image:\"]",                                       // 54.16667
-	"css-list-style-position":            "[style*=\"list-style-position:\"]",                                    // 87.5
-	"css-list-style":                     "[style*=\"list-style:\"]",                                             // 62.500004
-	"css-margin-block-start-end":         "[style*=\"margin-block-start:\"], [style*=\"margin-block-end:\"]",     // 32.07547
-	"css-margin-inline-block":            "[style*=\"margin-inline-block:\"]",                                    // 16.981125
-	"css-margin-inline-start-end":        "[style*=\"margin-inline-start:\"], [style*=\"margin-inline-end:\"]",   // 32.07547
-	"css-margin-inline":                  "[style*=\"margin-inline:\"]",                                          // 43.39623
-	"css-margin":                         "[style*=\"margin:\"]",                                                 // 71.42857
-	"css-max-block-size":                 "[style*=\"max-block-size:\"]",                                         // 35.714287
-	"css-max-height":                     "[style*=\"max-height:\"]",                                             // 86.95652
-	"css-max-width":                      "[style*=\"max-width:\"]",                                              // 76.47058
-	"css-min-height":                     "[style*=\"min-height:\"]",                                             // 82.608696
-	"css-min-inline-size":                "[style*=\"min-inline-size:\"]",                                        // 33.33333
-	"css-min-width":                      "[style*=\"min-width:\"]",                                              // 86.95652
-	"css-mix-blend-mode":                 "[style*=\"mix-blend-mode:\"]",                                         // 62.745094
-	"css-modern-color":                   "[style*=\"modern-color:\"]",                                           // 10.81081
-	"css-object-fit":                     "[style*=\"object-fit:\"]",                                             // 57.142857
-	"css-object-position":                "[style*=\"object-position:\"]",                                        // 55.10204
-	"css-opacity":                        "[style*=\"opacity:\"]",                                                // 63.04348
-	"css-outline-offset":                 "[style*=\"outline-offset:\"]",                                         // 42.5
-	"css-outline":                        "[style*=\"outline:\"]",                                                // 80.85106
-	"css-overflow-wrap":                  "[style*=\"overflow-wrap:\"]",                                          // 6.6666603
-	"css-overflow":                       "[style*=\"overflow:\"]",                                               // 78.26087
-	"css-padding-block-start-end":        "[style*=\"padding-block-start:\"], [style*=\"padding-block-end:\"]",   // 32.07547
-	"css-padding-inline-block":           "[style*=\"padding-inline-block:\"]",                                   // 16.981125
-	"css-padding-inline-start-end":       "[style*=\"padding-inline-start:\"], [style*=\"padding-inline-end:\"]", // 32.07547
-	"css-padding":                        "[style*=\"padding:\"], [padding]",                                     // 87.755104
-	"css-position":                       "[style*=\"position:\"]",                                               // 19.56522
-	"css-radial-gradient":                "[style*=\"radial-gradient:\"]",                                        // 64.583336
-	"css-rgb":                            "[style*=\"rgb(\"]",                                                    // 53.846153
-	"css-rgba":                           "[style*=\"rgba(\"]",                                                   // 56
-	"css-scroll-snap":                    "[style*=\"roll-snap:\"]",                                              // 38.88889
-	"css-tab-size":                       "[style*=\"tab-size:\"]",                                               // 32.075474
-	"css-table-layout":                   "[style*=\"table-layout:\"]",                                           // 53.33333
-	"css-text-align-last":                "[style*=\"text-align-last:\"]",                                        // 42.307693
-	"css-text-align":                     "[style*=\"text-align:\"]",                                             // 60.416664
-	"css-text-decoration-color":          "[style*=\"text-decoration-color:\"]",                                  // 67.34695
-	"css-text-decoration-thickness":      "[style*=\"text-decoration-thickness:\"]",                              // 38.333336
-	"css-text-decoration":                "[style*=\"text-decoration:\"]",                                        // 67.391304
-	"css-text-emphasis-position":         "[style*=\"text-emphasis-position:\"]",                                 // 28.571434
-	"css-text-emphasis":                  "[style*=\"text-emphasis:\"]",                                          // 36.734695
-	"css-text-indent":                    "[style*=\"text-indent:\"]",                                            // 78.43137
-	"css-text-overflow":                  "[style*=\"text-overflow:\"]",                                          // 58.695656
-	"css-text-shadow":                    "[style*=\"text-shadow:\"]",                                            // 69.565216
-	"css-text-transform":                 "[style*=\"text-transform:\"]",                                         // 86.666664
-	"css-text-underline-offset":          "[style*=\"text-underline-offset:\"]",                                  // 39.285713
-	"css-transform":                      "[style*=\"transform:\"]",                                              // 50
-	"css-unit-calc":                      "[style*=\"calc(:\"]",                                                  // 56.25
-	"css-variables":                      "[style*=\"variables:\"]",                                              // 46.551727
-	"css-visibility":                     "[style*=\"visibility:\"]",                                             // 52.173916
-	"css-white-space":                    "[style*=\"white-space:\"]",                                            // 58.69565
-	"css-width":                          "[style*=\"width:\"], [width]",                                         // 87.5
-	"css-word-break":                     "[style*=\"word-break:\"]",                                             // 28.888887
-	"css-writing-mode":                   "[style*=\"writing-mode:\"]",                                           // 56.25
-	"css-z-index":                        "[style*=\"z-index:\"]",                                                // 76.08696
+// inline attribute <match>=""
+var styleInlineAttributes = map[string]string{
+	"css-background-color": "[bgcolor]",
+	"css-background":       "[background]",
+	"css-border":           "[border]",
+	"css-height":           "[height]",
+	"css-padding":          "[padding]",
+	"css-width":            "[width]",
+}
+
+// inline style="<match>"
+var cssInlineRegexTests = map[string]*regexp.Regexp{
+	"css-accent-color":                   regexp.MustCompile(`(?i)(^|\s|;)accent-color(\s+)?:`),
+	"css-align-items":                    regexp.MustCompile(`(?i)(^|\s|;)align-items(\s+)?:`),
+	"css-aspect-ratio":                   regexp.MustCompile(`(?i)(^|\s|;)aspect-ratio(\s+)?:`),
+	"css-background-blend-mode":          regexp.MustCompile(`(?i)(^|\s|;)background-blend-mode(\s+)?:`),
+	"css-background-clip":                regexp.MustCompile(`(?i)(^|\s|;)background-clip(\s+)?:`),
+	"css-background-color":               regexp.MustCompile(`(?i)(^|\s|;)background-color(\s+)?:`),
+	"css-background-image":               regexp.MustCompile(`(?i)(^|\s|;)background-image(\s+)?:`),
+	"css-background-origin":              regexp.MustCompile(`(?i)(^|\s|;)background-origin(\s+)?:`),
+	"css-background-position":            regexp.MustCompile(`(?i)(^|\s|;)background-position(\s+)?:`),
+	"css-background-repeat":              regexp.MustCompile(`(?i)(^|\s|;)background-repeat(\s+)?:`),
+	"css-background-size":                regexp.MustCompile(`(?i)(^|\s|;)background-size(\s+)?:`),
+	"css-background":                     regexp.MustCompile(`(?i)(^|\s|;)background(\s+)?:`),
+	"css-block-inline-size":              regexp.MustCompile(`(?i)(^|\s|;)block-inline-size(\s+)?:`),
+	"css-border-image":                   regexp.MustCompile(`(?i)(^|\s|;)border-image(\s+)?:`),
+	"css-border-inline-block-individual": regexp.MustCompile(`(?i)(^|\s|;)border-inline(\s+)?:`),
+	"css-border-radius":                  regexp.MustCompile(`(?i)(^|\s|;)border-radius(\s+)?:`),
+	"css-border":                         regexp.MustCompile(`(?i)(^|\s|;)border(\s+)?:`),
+	"css-box-shadow":                     regexp.MustCompile(`(?i)(^|\s|;)box-shadow(\s+)?:`),
+	"css-box-sizing":                     regexp.MustCompile(`(?i)(^|\s|;)box-sizing(\s+)?:`),
+	"css-caption-side":                   regexp.MustCompile(`(?i)(^|\s|;)caption-side(\s+)?:`),
+	"css-clip-path":                      regexp.MustCompile(`(?i)(^|\s|;)clip-path(\s+)?:`),
+	"css-column-count":                   regexp.MustCompile(`(?i)(^|\s|;)column-count(\s+)?:`),
+	"css-column-layout-properties":       regexp.MustCompile(`(?i)(^|\s|;)column-layout-properties(\s+)?:`),
+	"css-conic-gradient":                 regexp.MustCompile(`(?i)(^|\s|;)conic-gradient(\s+)?:`),
+	"css-direction":                      regexp.MustCompile(`(?i)(^|\s|;)direction(\s+)?:`),
+	"css-display-flex":                   regexp.MustCompile(`(?i)(^|\s|;)display(\s+)?:(\s+)?flex($|\s|;)`),
+	"css-display-grid":                   regexp.MustCompile(`(?i)(^|\s|;)display:grid`),
+	"css-display-none":                   regexp.MustCompile(`(?i)(^|\s|;)display:none`),
+	"css-display":                        regexp.MustCompile(`(?i)(^|\s|;)display(\s+)?:`),
+	"css-filter":                         regexp.MustCompile(`(?i)(^|\s|;)filter(\s+)?:`),
+	"css-flex-direction":                 regexp.MustCompile(`(?i)(^|\s|;)flex-direction(\s+)?:`),
+	"css-flex-wrap":                      regexp.MustCompile(`(?i)(^|\s|;)flex-wrap(\s+)?:`),
+	"css-float":                          regexp.MustCompile(`(?i)(^|\s|;)float(\s+)?:`),
+	"css-font-kerning":                   regexp.MustCompile(`(?i)(^|\s|;)font-kerning(\s+)?:`),
+	"css-font-weight":                    regexp.MustCompile(`(?i)(^|\s|;)font-weight(\s+)?:`),
+	"css-font":                           regexp.MustCompile(`(?i)(^|\s|;)font(\s+)?:`),
+	"css-gap":                            regexp.MustCompile(`(?i)(^|\s|;)gap(\s+)?:`),
+	"css-grid-template":                  regexp.MustCompile(`(?i)(^|\s|;)grid-template(\s+)?:`),
+	"css-height":                         regexp.MustCompile(`(?i)(^|\s|;)height(\s+)?:`),
+	"css-hyphens":                        regexp.MustCompile(`(?i)(^|\s|;)hyphens(\s+)?:`),
+	"css-important":                      regexp.MustCompile(`(?i)!important($|\s|;)`),
+	"css-inline-size":                    regexp.MustCompile(`(?i)(^|\s|;)inline-size(\s+)?:`),
+	"css-intrinsic-size":                 regexp.MustCompile(`(?i)(^|\s|;)intrinsic-size(\s+)?:`),
+	"css-justify-content":                regexp.MustCompile(`(?i)(^|\s|;)justify-content(\s+)?:`),
+	"css-letter-spacing":                 regexp.MustCompile(`(?i)(^|\s|;)letter-spacing(\s+)?:`),
+	"css-line-height":                    regexp.MustCompile(`(?i)(^|\s|;)line-height(\s+)?:`),
+	"css-list-style-image":               regexp.MustCompile(`(?i)(^|\s|;)list-style-image(\s+)?:`),
+	"css-list-style-position":            regexp.MustCompile(`(?i)(^|\s|;)list-style-position(\s+)?:`),
+	"css-list-style":                     regexp.MustCompile(`(?i)(^|\s|;)list-style(\s+)?:`),
+	"css-margin-block-start-end":         regexp.MustCompile(`(?i)(^|\s|;)margin-block-(start|end)(\s+)?:`),
+	"css-margin-inline-block":            regexp.MustCompile(`(?i)(^|\s|;)margin-inline-block(\s+)?:`),
+	"css-margin-inline-start-end":        regexp.MustCompile(`(?i)(^|\s|;)margin-inline-(start|end)(\s+)?:`),
+	"css-margin-inline":                  regexp.MustCompile(`(?i)(^|\s|;)margin-inline(\s+)?:`),
+	"css-margin":                         regexp.MustCompile(`(?i)(^|\s|;)margin(\s+)?:`),
+	"css-max-block-size":                 regexp.MustCompile(`(?i)(^|\s|;)max-block-size(\s+)?:`),
+	"css-max-height":                     regexp.MustCompile(`(?i)(^|\s|;)max-height(\s+)?:`),
+	"css-max-width":                      regexp.MustCompile(`(?i)(^|\s|;)max-width(\s+)?:`),
+	"css-min-height":                     regexp.MustCompile(`(?i)(^|\s|;)min-height(\s+)?:`),
+	"css-min-inline-size":                regexp.MustCompile(`(?i)(^|\s|;)min-inline-size(\s+)?:`),
+	"css-min-width":                      regexp.MustCompile(`(?i)(^|\s|;)min-width(\s+)?:`),
+	"css-mix-blend-mode":                 regexp.MustCompile(`(?i)(^|\s|;)mix-blend-mode(\s+)?:`),
+	"css-modern-color":                   regexp.MustCompile(`(?i)(^|\s|;)modern-color(\s+)?:`),
+	"css-object-fit":                     regexp.MustCompile(`(?i)(^|\s|;)object-fit(\s+)?:`),
+	"css-object-position":                regexp.MustCompile(`(?i)(^|\s|;)object-position(\s+)?:`),
+	"css-opacity":                        regexp.MustCompile(`(?i)(^|\s|;)opacity(\s+)?:`),
+	"css-outline-offset":                 regexp.MustCompile(`(?i)(^|\s|;)outline-offset(\s+)?:`),
+	"css-outline":                        regexp.MustCompile(`(?i)(^|\s|;)outline(\s+)?:`),
+	"css-overflow-wrap":                  regexp.MustCompile(`(?i)(^|\s|;)overflow-wrap(\s+)?:`),
+	"css-overflow":                       regexp.MustCompile(`(?i)(^|\s|;)overflow(\s+)?:`),
+	"css-padding-block-start-end":        regexp.MustCompile(`(?i)(^|\s|;)padding-block-(start|end)(\s+)?:`),
+	"css-padding-inline-block":           regexp.MustCompile(`(?i)(^|\s|;)padding-inline-block(\s+)?:`),
+	"css-padding-inline-start-end":       regexp.MustCompile(`(?i)(^|\s|;)padding-inline-(start|end)(\s+)?:`),
+	"css-padding":                        regexp.MustCompile(`(?i)(^|\s|;)padding(\s+)?:`),
+	"css-position":                       regexp.MustCompile(`(?i)(^|\s|;)position(\s+)?:`),
+	"css-radial-gradient":                regexp.MustCompile(`(?i)(^|\s|;)radial-gradient(\s+)?:`),
+	"css-rgb":                            regexp.MustCompile(`(?i)(\s|:)rgb\(`),
+	"css-rgba":                           regexp.MustCompile(`(?i)(\s|:)rgba\(`),
+	"css-scroll-snap":                    regexp.MustCompile(`(?i)(^|\s|;)roll-snap(\s+)?:`),
+	"css-tab-size":                       regexp.MustCompile(`(?i)(^|\s|;)tab-size(\s+)?:`),
+	"css-table-layout":                   regexp.MustCompile(`(?i)(^|\s|;)table-layout(\s+)?:`),
+	"css-text-align-last":                regexp.MustCompile(`(?i)(^|\s|;)text-align-last(\s+)?:`),
+	"css-text-align":                     regexp.MustCompile(`(?i)(^|\s|;)text-align(\s+)?:`),
+	"css-text-decoration-color":          regexp.MustCompile(`(?i)(^|\s|;)text-decoration-color(\s+)?:`),
+	"css-text-decoration-thickness":      regexp.MustCompile(`(?i)(^|\s|;)text-decoration-thickness(\s+)?:`),
+	"css-text-decoration":                regexp.MustCompile(`(?i)(^|\s|;)text-decoration(\s+)?:`),
+	"css-text-emphasis-position":         regexp.MustCompile(`(?i)(^|\s|;)text-emphasis-position(\s+)?:`),
+	"css-text-emphasis":                  regexp.MustCompile(`(?i)(^|\s|;)text-emphasis(\s+)?:`),
+	"css-text-indent":                    regexp.MustCompile(`(?i)(^|\s|;)text-indent(\s+)?:`),
+	"css-text-overflow":                  regexp.MustCompile(`(?i)(^|\s|;)text-overflow(\s+)?:`),
+	"css-text-shadow":                    regexp.MustCompile(`(?i)(^|\s|;)text-shadow(\s+)?:`),
+	"css-text-transform":                 regexp.MustCompile(`(?i)(^|\s|;)text-transform(\s+)?:`),
+	"css-text-underline-offset":          regexp.MustCompile(`(?i)(^|\s|;)text-underline-offset(\s+)?:`),
+	"css-transform":                      regexp.MustCompile(`(?i)(^|\s|;)transform(\s+)?:`),
+	"css-unit-calc":                      regexp.MustCompile(`(?i)(\s|:)calc\(`),
+	"css-variables":                      regexp.MustCompile(`(?i)(^|\s|;)variables(\s+)?:`),
+	"css-visibility":                     regexp.MustCompile(`(?i)(^|\s|;)visibility(\s+)?:`),
+	"css-white-space":                    regexp.MustCompile(`(?i)(^|\s|;)white-space(\s+)?:`),
+	"css-width":                          regexp.MustCompile(`(?i)(^|\s|;)width(\s+)?:`),
+	"css-word-break":                     regexp.MustCompile(`(?i)(^|\s|;)word-break(\s+)?:`),
+	"css-writing-mode":                   regexp.MustCompile(`(?i)(^|\s|;)writing-mode(\s+)?:`),
+	"css-z-index":                        regexp.MustCompile(`(?i)(^|\s|;)z-index(\s+)?:`),
 }
 
 // some CSS tests using regex for things that can't be merged inline
 var cssRegexpTests = map[string]*regexp.Regexp{
-	"css-at-font-face":                  regexp.MustCompile(`(?mi)@font\-face\s+?{`),        // 26.923073
-	"css-at-import":                     regexp.MustCompile(`(?mi)@import\s`),               // 36.170216
-	"css-at-keyframes":                  regexp.MustCompile(`(?mi)@keyframes\s`),            // 31.914898
-	"css-at-media":                      regexp.MustCompile(`(?mi)@media\s?\(`),             // 47.05882
-	"css-at-supports":                   regexp.MustCompile(`(?mi)@supports\s?\(`),          // 40.81633
-	"css-pseudo-class-active":           regexp.MustCompile(`:active`),                      // 52.173912
-	"css-pseudo-class-checked":          regexp.MustCompile(`:checked`),                     // 31.91489
-	"css-pseudo-class-first-child":      regexp.MustCompile(`:first\-child`),                // 66.666664
-	"css-pseudo-class-first-of-type":    regexp.MustCompile(`:first\-of\-type`),             // 62.5
-	"css-pseudo-class-focus":            regexp.MustCompile(`:focus`),                       // 47.826088
-	"css-pseudo-class-has":              regexp.MustCompile(`:has`),                         // 25.531914
-	"css-pseudo-class-hover":            regexp.MustCompile(`:hover`),                       // 60.41667
-	"css-pseudo-class-lang":             regexp.MustCompile(`:lang\s?\(`),                   // 18.918922
-	"css-pseudo-class-last-child":       regexp.MustCompile(`:last\-child`),                 // 64.58333
-	"css-pseudo-class-last-of-type":     regexp.MustCompile(`:last\-of\-type`),              // 60.416664
-	"css-pseudo-class-link":             regexp.MustCompile(`:link`),                        // 81.63265
-	"css-pseudo-class-not":              regexp.MustCompile(`:not(\s+)?\(`),                 // 44.89796
-	"css-pseudo-class-nth-child":        regexp.MustCompile(`:nth\-child(\s+)?\(`),          // 44.89796
-	"css-pseudo-class-nth-last-child":   regexp.MustCompile(`:nth\-last\-child(\s+)?\(`),    // 44.89796
-	"css-pseudo-class-nth-last-of-type": regexp.MustCompile(`:nth\-last\-of\-type(\s+)?\(`), // 42.857143
-	"css-pseudo-class-nth-of-type":      regexp.MustCompile(`:nth\-of\-type(\s+)?\(`),       // 42.857143
-	"css-pseudo-class-only-child":       regexp.MustCompile(`:only\-child(\s+)?\(`),         // 64.58333
-	"css-pseudo-class-only-of-type":     regexp.MustCompile(`:only\-of\-type(\s+)?\(`),      // 64.58333
-	"css-pseudo-class-target":           regexp.MustCompile(`:target`),                      // 39.13044
-	"css-pseudo-class-visited":          regexp.MustCompile(`:visited`),                     // 39.13044
-	"css-pseudo-element-after":          regexp.MustCompile(`:after`),                       // 40
-	"css-pseudo-element-before":         regexp.MustCompile(`:before`),                      // 40
-	"css-pseudo-element-first-letter":   regexp.MustCompile(`::first\-letter`),              // 60
-	"css-pseudo-element-first-line":     regexp.MustCompile(`::first\-line`),                // 60
-	"css-pseudo-element-marker":         regexp.MustCompile(`::marker`),                     // 50
-	"css-pseudo-element-placeholder":    regexp.MustCompile(`::placeholder`),                // 32
+	"css-at-font-face":                  regexp.MustCompile(`(?mi)@font\-face\s+?{`),
+	"css-at-import":                     regexp.MustCompile(`(?mi)@import\s`),
+	"css-at-keyframes":                  regexp.MustCompile(`(?mi)@keyframes\s`),
+	"css-at-media":                      regexp.MustCompile(`(?mi)@media\s?\(`),
+	"css-at-supports":                   regexp.MustCompile(`(?mi)@supports\s?\(`),
+	"css-pseudo-class-active":           regexp.MustCompile(`:active`),
+	"css-pseudo-class-checked":          regexp.MustCompile(`:checked`),
+	"css-pseudo-class-first-child":      regexp.MustCompile(`:first\-child`),
+	"css-pseudo-class-first-of-type":    regexp.MustCompile(`:first\-of\-type`),
+	"css-pseudo-class-focus":            regexp.MustCompile(`:focus`),
+	"css-pseudo-class-has":              regexp.MustCompile(`:has`),
+	"css-pseudo-class-hover":            regexp.MustCompile(`:hover`),
+	"css-pseudo-class-lang":             regexp.MustCompile(`:lang\s?\(`),
+	"css-pseudo-class-last-child":       regexp.MustCompile(`:last\-child`),
+	"css-pseudo-class-last-of-type":     regexp.MustCompile(`:last\-of\-type`),
+	"css-pseudo-class-link":             regexp.MustCompile(`:link`),
+	"css-pseudo-class-not":              regexp.MustCompile(`:not(\s+)?\(`),
+	"css-pseudo-class-nth-child":        regexp.MustCompile(`:nth\-child(\s+)?\(`),
+	"css-pseudo-class-nth-last-child":   regexp.MustCompile(`:nth\-last\-child(\s+)?\(`),
+	"css-pseudo-class-nth-last-of-type": regexp.MustCompile(`:nth\-last\-of\-type(\s+)?\(`),
+	"css-pseudo-class-nth-of-type":      regexp.MustCompile(`:nth\-of\-type(\s+)?\(`),
+	"css-pseudo-class-only-child":       regexp.MustCompile(`:only\-child(\s+)?\(`),
+	"css-pseudo-class-only-of-type":     regexp.MustCompile(`:only\-of\-type(\s+)?\(`),
+	"css-pseudo-class-target":           regexp.MustCompile(`:target`),
+	"css-pseudo-class-visited":          regexp.MustCompile(`:visited`),
+	"css-pseudo-element-after":          regexp.MustCompile(`:after`),
+	"css-pseudo-element-before":         regexp.MustCompile(`:before`),
+	"css-pseudo-element-first-letter":   regexp.MustCompile(`::first\-letter`),
+	"css-pseudo-element-first-line":     regexp.MustCompile(`::first\-line`),
+	"css-pseudo-element-marker":         regexp.MustCompile(`::marker`),
+	"css-pseudo-element-placeholder":    regexp.MustCompile(`::placeholder`),
 }
 
 // some CSS tests using regex for units
 var cssRegexpUnitTests = map[string]*regexp.Regexp{
-	"css-unit-ch":      regexp.MustCompile(`\b\d+ch\b`),     // 66.666664
-	"css-unit-initial": regexp.MustCompile(`:\s?initial\b`), // 58.33333
-	"css-unit-rem":     regexp.MustCompile(`\b\d+rem\b`),    // 66.666664
-	"css-unit-vh":      regexp.MustCompile(`\b\d+vh\b`),     // 68.75
-	"css-unit-vmax":    regexp.MustCompile(`\b\d+vmax\b`),   // 60.416664
-	"css-unit-vmin":    regexp.MustCompile(`\b\d+vmin\b`),   // 58.333336
-	"css-unit-vw":      regexp.MustCompile(`\b\d+vw\b`),     // 77.08333
+	"css-unit-ch":      regexp.MustCompile(`\b\d+ch\b`),
+	"css-unit-initial": regexp.MustCompile(`:\s?initial\b`),
+	"css-unit-rem":     regexp.MustCompile(`\b\d+rem\b`),
+	"css-unit-vh":      regexp.MustCompile(`\b\d+vh\b`),
+	"css-unit-vmax":    regexp.MustCompile(`\b\d+vmax\b`),
+	"css-unit-vmin":    regexp.MustCompile(`\b\d+vmin\b`),
+	"css-unit-vw":      regexp.MustCompile(`\b\d+vw\b`),
 }

internal/htmlcheck/css.go

@@ -1,8 +1,11 @@
 package htmlcheck
 
 import (
+	"context"
+	"errors"
 	"fmt"
 	"io"
+	"net"
 	"net/http"
 	"net/url"
 	"strings"
@@ -42,17 +45,15 @@ func runCSSTests(html string) ([]Warning, int, error) {
 		return results, totalTests, err
 	}
 
-	for key, test := range cssInlineTests {
-		totalTests++
-		found := len(doc.Find(test).Nodes)
-		if found > 0 {
-			result, err := cie.getTest(key)
-			if err != nil {
-				return results, totalTests, err
-			}
-			result.Score.Found = found
+	inlineStyleResults := testInlineStyles(doc)
+	totalTests = totalTests + len(cssInlineRegexTests) + len(styleInlineAttributes)
+	for key, count := range inlineStyleResults {
+		result, err := cie.getTest(key)
+		if err == nil {
+			result.Score.Found = count
 			results = append(results, result)
 		}
+
 	}
 
 	// get a list of all generated styles from all nodes
@@ -143,19 +144,20 @@ func inlineRemoteCSS(h string) (string, error) {
 		attributes := link.Attr
 		for _, a := range attributes {
 			if a.Key == "href" {
-				if !isURL(a.Val) {
-					// skip invalid URL
-					continue
-				}
-
 				if config.BlockRemoteCSSAndFonts {
 					logger.Log().Debugf("[html-check] skip testing remote CSS content: %s (--block-remote-css-and-fonts)", a.Val)
 					return h, nil
 				}
 
-				resp, err := downloadToBytes(a.Val)
+				if !isValidURL(a.Val) {
+					// skip invalid URL
+					logger.Log().Warnf("[html-check] ignoring unsupported stylesheet URL: %s", a.Val)
+					continue
+				}
+
+				resp, err := downloadCSSToBytes(a.Val)
 				if err != nil {
-					logger.Log().Warnf("[html-check] failed to download %s", a.Val)
+					logger.Log().Warnf("[html-check] %s", err.Error())
 					continue
 				}
 
@@ -184,25 +186,41 @@ func inlineRemoteCSS(h string) (string, error) {
 	return newDoc, nil
 }
 
-// DownloadToBytes returns a []byte slice from a URL
-func downloadToBytes(url string) ([]byte, error) {
-	client := http.Client{
-		Timeout: 5 * time.Second,
-	}
-
-	// Get the link response data
-	resp, err := client.Get(url)
+// DownloadCSSToBytes returns a []byte slice from a URL.
+// It requires the HTTP response code to be 200 and the content-type to be text/css.
+// It will download a maximum of 5MB.
+func downloadCSSToBytes(url string) ([]byte, error) {
+	client := newSafeHTTPClient()
+	req, err := http.NewRequestWithContext(context.TODO(), http.MethodGet, url, nil)
 	if err != nil {
 		return nil, err
 	}
-	defer resp.Body.Close()
+
+	req.Header.Set("User-Agent", "Mailpit HTML Checker/"+config.Version)
+
+	// Get the link response data
+	resp, err := client.Do(req)
+	if err != nil {
+		return nil, err
+	}
+	defer func() { _ = resp.Body.Close() }()
 
 	if resp.StatusCode != 200 {
-		err := fmt.Errorf("Error downloading %s", url)
+		err := fmt.Errorf("error downloading %s", url)
 		return nil, err
 	}
 
-	body, err := io.ReadAll(resp.Body)
+	ct := strings.ToLower(resp.Header.Get("content-type"))
+	if !strings.Contains(ct, "text/css") {
+		err := fmt.Errorf("invalid CSS content-type from %s: \"%s\" (expected \"text/css\")", url, ct)
+		return nil, err
+	}
+
+	// set a limit on the number of bytes to read - max 5MB
+	limit := int64(5242880)
+	limitedReader := &io.LimitedReader{R: resp.Body, N: limit}
+
+	body, err := io.ReadAll(limitedReader)
 	if err != nil {
 		return nil, err
 	}
@@ -210,8 +228,83 @@ func downloadToBytes(url string) ([]byte, error) {
 	return body, nil
 }
 
-// Test if str is a URL
-func isURL(str string) bool {
+// Test if the string is a supported URL.
+// The URL must have the "http" or "https" scheme, and must not contain any login info (http://user:pass@<host>).
+func isValidURL(str string) bool {
 	u, err := url.Parse(str)
-	return err == nil && (u.Scheme == "http" || u.Scheme == "https") && u.Host != ""
+
+	return err == nil && (u.Scheme == "http" || u.Scheme == "https") && u.Hostname() != "" && u.User.String() == ""
+}
+
+// Test the HTML for inline CSS styles and styling attributes
+func testInlineStyles(doc *goquery.Document) map[string]int {
+	matches := make(map[string]int)
+
+	// find all elements containing a style attribute
+	styles := doc.Find("[style]").Nodes
+	for _, s := range styles {
+		style, err := tools.GetHTMLAttributeVal(s, "style")
+		if err != nil {
+			continue
+		}
+
+		for id, test := range cssInlineRegexTests {
+			if test.MatchString(style) {
+				if _, ok := matches[id]; !ok {
+					matches[id] = 0
+				}
+				matches[id]++
+			}
+		}
+	}
+
+	// find all elements containing styleInlineAttributes
+	for id, test := range styleInlineAttributes {
+		a := doc.Find(test).Nodes
+		if len(a) > 0 {
+			if _, ok := matches[id]; !ok {
+				matches[id] = 0
+			}
+			matches[id]++
+		}
+	}
+
+	return matches
+}
+
+func newSafeHTTPClient() *http.Client {
+	dialer := &net.Dialer{
+		Timeout:   5 * time.Second,
+		KeepAlive: 30 * time.Second,
+	}
+
+	tr := &http.Transport{
+		Proxy: nil, // avoid env proxy surprises unless you explicitly want it
+		DialContext: func(ctx context.Context, network, address string) (net.Conn, error) {
+			return dialer.DialContext(ctx, network, address)
+		},
+		TLSHandshakeTimeout:   5 * time.Second,
+		ResponseHeaderTimeout: 10 * time.Second,
+		ExpectContinueTimeout: 1 * time.Second,
+		IdleConnTimeout:       30 * time.Second,
+		MaxIdleConns:          50,
+	}
+
+	client := &http.Client{
+		Transport: tr,
+		Timeout:   15 * time.Second,
+		CheckRedirect: func(req *http.Request, via []*http.Request) error {
+			// re-validate every redirect hop.
+			if len(via) >= 3 {
+				return errors.New("too many redirects")
+			}
+			if !isValidURL(req.URL.String()) {
+				return errors.New("invalid redirect URL")
+			}
+
+			return nil
+		},
+	}
+
+	return client
 }

internal/htmlcheck/inline_test.go

@@ -0,0 +1,81 @@
+package htmlcheck
+
+import (
+	"fmt"
+	"sort"
+	"strings"
+	"testing"
+
+	"github.com/PuerkitoBio/goquery"
+)
+
+func TestInlineStyleDetection(t *testing.T) {
+	/// tests should contain the HTML test, and expected test results in alphabetical order
+	tests := map[string]string{}
+	tests[`<h1 style="transform: rotate(20deg)">Heading</h1>`] = "css-transform"
+	tests[`<h1 style="color: green; transform:rotate(20deg)">Heading</h1>`] = "css-transform"
+	tests[`<h1 style="color:green; transform :rotate(20deg)">Heading</h1>`] = "css-transform"
+	tests[`<h1 style="transform:rotate(20deg)">Heading</h1>`] = "css-transform"
+	tests[`<h1 style="TRANSFORM:rotate(20deg)">Heading</h1>`] = "css-transform"
+	tests[`<h1 style="transform:	rotate(20deg)">Heading</h1>`] = "css-transform"
+	tests[`<h1 style="ignore-transform: something">Heading</h1>`] = "" // no match
+	tests[`<h1 style="text-transform: uppercase">Heading</h1>`] = "css-text-transform"
+	tests[`<h1 style="text-transform: uppercase; text-transform: uppercase">Heading</h1>`] = "css-text-transform"
+	tests[`<h1 style="test-transform: uppercase">Heading</h1>`] = "" // no match
+	tests[`<h1 style="padding-inline-start: 5rem">Heading</h1>`] = "css-padding-inline-start-end"
+	tests[`<h1 style="margin-inline-end: 5rem">Heading</h1>`] = "css-margin-inline-start-end"
+	tests[`<h1 style="margin-inline-middle: 5rem">Heading</h1>`] = "" // no match
+	tests[`<h1 style="color:green!important">Heading</h1>`] = "css-important"
+	tests[`<h1 style="color: green !important">Heading</h1>`] = "css-important"
+	tests[`<h1 style="color: green!important;">Heading</h1>`] = "css-important"
+	tests[`<h1 style="color:green!important-stuff;">Heading</h1>`] = "" // no match
+	tests[`<h1 style="background-image:url('img.jpg')">Heading</h1>`] = "css-background-image"
+	tests[`<h1 style="background-image:url('img.jpg'); color: green">Heading</h1>`] = "css-background-image"
+	tests[`<h1 style=" color:green; background-image:url('img.jpg');">Heading</h1>`] = "css-background-image"
+	tests[`<h1 style="display  : flex ;">Heading</h1>`] = "css-display,css-display-flex"
+	tests[`<h1 style="DISPLAY:FLEX;">Heading</h1>`] = "css-display,css-display-flex"
+	tests[`<h1 style="display: flexing;">Heading</h1>`] = "css-display" // should not match css-display-flex rule
+	tests[`<h1 style="line-height: 1rem;opacity: 0.5; width: calc(10px + 100px)">Heading</h1>`] = "css-line-height,css-opacity,css-unit-calc,css-width"
+	tests[`<h1 style="color: rgb(255,255,255);">Heading</h1>`] = "css-rgb"
+	tests[`<h1 style="color:rgb(255,255,255);">Heading</h1>`] = "css-rgb"
+	tests[`<h1 style="color:rgb(255,255,255);">Heading</h1>`] = "css-rgb"
+	tests[`<h1 style="color:rgba(255,255,255, 0);">Heading</h1>`] = "css-rgba"
+	tests[`<h1 style="border: solid rgb(255,255,255) 1px; color:rgba(255,255,255, 0);">Heading</h1>`] = "css-border,css-rgb,css-rgba"
+	tests[`<h1 border="2">Heading</h1>`] = "css-border"
+	tests[`<h1 border="2" background="green">Heading</h1>`] = "css-background,css-border"
+	tests[`<h1 BORDER="2" BACKGROUND="GREEN">Heading</h1>`] = "css-background,css-border"
+	tests[`<h1 border-something="2" background-something="green">Heading</h1>`] = "" // no match
+	tests[`<h1 border="2" style="border: solid green 1px!important">Heading</h1>`] = "css-border,css-important"
+
+	for html, expected := range tests {
+		reader := strings.NewReader(html)
+		doc, err := goquery.NewDocumentFromReader(reader)
+		if err != nil {
+			t.Log("error ", err)
+			t.Fail()
+		}
+
+		results := testInlineStyles(doc)
+
+		matches := []string{}
+		uniqMap := make(map[string]bool)
+		for key := range results {
+			if _, exists := uniqMap[key]; !exists {
+				matches = append(matches, key)
+			}
+		}
+
+		// ensure results are sorted to ensure consistent results
+		sort.Strings(matches)
+
+		assertEqual(t, expected, strings.Join(matches, ","), fmt.Sprintf("inline style detection \"%s\"", html))
+	}
+}
+
+func assertEqual(t *testing.T, a interface{}, b interface{}, message string) {
+	if a == b {
+		return
+	}
+	message = fmt.Sprintf("%s: \"%v\" != \"%v\"", message, a, b)
+	t.Fatal(message)
+}

internal/htmlcheck/main.go

@@ -152,19 +152,20 @@ func (c CanIEmail) getTest(k string) (Warning, error) {
 				s.Platform = platform
 				s.Version = version
 
-				if support == "y" {
+				switch support {
+				case "y":
 					y++
 					s.Support = "yes"
-				} else if support == "n" {
+				case "n":
 					n++
 					s.Support = "no"
-				} else {
+				default:
 					p++
 					s.Support = "partial"
 
-					noteIDS := noteMatch.FindStringSubmatch(fmt.Sprintf("%s", support))
+					noteIDs := noteMatch.FindStringSubmatch(fmt.Sprintf("%s", support))
 
-					for _, id := range noteIDS {
+					for _, id := range noteIDs {
 						s.NoteNumber = id
 					}
 				}

internal/linkcheck/linkcheck_test.go

@@ -31,7 +31,14 @@ var (
 	</html>`
 
 	expectedHTMLLinks = []string{
-		"http://example.com", "https://example.com", "HTTPS://EXAMPLE.COM", "http://localhost", "https://localhost", "https://127.0.0.1", "http://link with spaces", "http://example.com/?blaah=yes&test=true",
+		"http://example.com",
+		"https://example.com",
+		"HTTPS://EXAMPLE.COM",
+		"http://localhost",
+		"https://localhost",
+		"https://127.0.0.1",
+		"http://link with spaces",
+		"http://example.com/?blaah=yes&test=true",
 		"http://remote-host/style.css",  // css
 		"https://example.com/image.jpg", // images
 	}
@@ -41,10 +48,18 @@ var (
 		[http://localhost]
 		www.google.com < ignored
 		|||http://example.com/?some=query-string|||
+		// RFC2396 appendix E states angle brackets are recommended for text/plain emails to
+		// recognize potential spaces in between the URL
+		<https://example.com/ link with spaces>
 	`
 
 	expectedTextLinks = []string{
-		"http://example.com", "https://example.com", "HTTPS://EXAMPLE.COM", "http://localhost", "http://example.com/?some=query-string",
+		"http://example.com",
+		"https://example.com",
+		"HTTPS://EXAMPLE.COM",
+		"http://localhost",
+		"http://example.com/?some=query-string",
+		"https://example.com/ link with spaces",
 	}
 )
 

internal/linkcheck/main.go

@@ -30,9 +30,28 @@ func RunTests(msg *storage.Message, followRedirects bool) (Response, error) {
 }
 
 func extractTextLinks(msg *storage.Message) []string {
+	testLinkRe := regexp.MustCompile(`(?im)([^<]\b)((http|https):\/\/([\-\w@:%_\+'!.~#?,&\/\/=;]+))`)
+	// RFC2396 appendix E states angle brackets are recommended for text/plain emails to
+	// recognize potential spaces in between the URL
+	// @see https://www.rfc-editor.org/rfc/rfc2396#appendix-E
+	bracketLinkRe := regexp.MustCompile(`(?im)<((http|https):\/\/([\-\w@:%_\+'!.~#?,&\/\/=;][^>]+))>`)
+
 	links := []string{}
 
-	links = append(links, linkRe.FindAllString(msg.Text, -1)...)
+	matches := testLinkRe.FindAllStringSubmatch(msg.Text, -1)
+	for _, match := range matches {
+		if len(match) > 0 {
+			links = append(links, match[2])
+		}
+	}
+
+	angleMatches := bracketLinkRe.FindAllStringSubmatch(msg.Text, -1)
+	for _, match := range angleMatches {
+		if len(match) > 0 {
+			link := strings.ReplaceAll(match[1], "\n", "")
+			links = append(links, link)
+		}
+	}
 
 	return links
 }

internal/logger/logger.go

@@ -66,17 +66,6 @@ func PrettyPrint(i interface{}) {
 	fmt.Println(string(s))
 }
 
-// CleanIP returns a human-readable IP for the logging interface
-// when starting services. It translates [::]:<port> to "0.0.0.0:<port>"
-func CleanIP(s string) string {
-	re := regexp.MustCompile(`^\[\:\:\]\:\d+`)
-	if re.MatchString(s) {
-		return "0.0.0.0:" + s[5:]
-	}
-
-	return s
-}
-
 // CleanHTTPIP returns a human-readable IP for the logging interface
 // when starting services. It translates [::]:<port> to "localhost:<port>"
 func CleanHTTPIP(s string) string {

internal/pop3/functions.go

@@ -18,7 +18,7 @@ func authUser(username, password string) bool {
 
 // Send a response with debug logging
 func sendResponse(c net.Conn, m string) {
-	fmt.Fprintf(c, "%s\r\n", m)
+	_, _ = fmt.Fprintf(c, "%s\r\n", m)
 	logger.Log().Debugf("[pop3] response: %s", m)
 
 	if strings.HasPrefix(m, "-ERR ") {
@@ -29,7 +29,7 @@ func sendResponse(c net.Conn, m string) {
 
 // Send a response without debug logging (for data)
 func sendData(c net.Conn, m string) {
-	fmt.Fprintf(c, "%s\r\n", m)
+	_, _ = fmt.Fprintf(c, "%s\r\n", m)
 }
 
 // Get the latest 100 messages

internal/pop3/pop3_test.go

@@ -15,7 +15,7 @@ import (
 	"github.com/axllent/mailpit/internal/logger"
 	"github.com/axllent/mailpit/internal/pop3client"
 	"github.com/axllent/mailpit/internal/storage"
-	"github.com/jhillyerd/enmime"
+	"github.com/jhillyerd/enmime/v2"
 )
 
 var (
@@ -29,22 +29,21 @@ func TestPOP3(t *testing.T) {
 
 	// connect with bad password
 	t.Log("Testing invalid login")
-	c, err := connectBadAuth()
-	if err == nil {
+	if _, err := connectBadAuth(); err == nil {
 		t.Error("invalid login gained access")
 		return
 	}
 
 	t.Log("Testing valid login")
-	c, err = connectAuth()
+	c, err := connectAuth()
 	if err != nil {
-		t.Errorf(err.Error())
+		t.Error(err.Error())
 		return
 	}
 
 	count, size, err := c.Stat()
 	if err != nil {
-		t.Errorf(err.Error())
+		t.Error(err.Error())
 		return
 	}
 
@@ -53,7 +52,7 @@ func TestPOP3(t *testing.T) {
 
 	// quit else we get old data
 	if err := c.Quit(); err != nil {
-		t.Errorf(err.Error())
+		t.Error(err.Error())
 		return
 	}
 
@@ -63,13 +62,13 @@ func TestPOP3(t *testing.T) {
 
 	c, err = connectAuth()
 	if err != nil {
-		t.Errorf(err.Error())
+		t.Error(err.Error())
 		return
 	}
 
 	count, _, err = c.Stat()
 	if err != nil {
-		t.Errorf(err.Error())
+		t.Error(err.Error())
 		return
 	}
 
@@ -80,29 +79,69 @@ func TestPOP3(t *testing.T) {
 	for i := 1; i <= 20; i++ {
 		_, err := c.Retr(i)
 		if err != nil {
-			t.Errorf(err.Error())
+			t.Error(err.Error())
 			return
 		}
 	}
 
+	t.Log("Checking UIDL with multiple arguments")
+
+	_, err = c.Cmd("UIDL", false, 1, 2, 3)
+	if err == nil {
+		t.Error("UIDL with multiple arguments should return an error")
+		return
+	}
+
+	t.Log("Checking UIDL without a message id")
+
+	messageIDs, err := c.Uidl(0)
+	if err != nil {
+		t.Error(err.Error())
+		return
+	}
+
+	if len(messageIDs) != 50 {
+		assertEqual(t, len(messageIDs), 50, "incorrect UIDL message count")
+	}
+
+	t.Log("Checking UIDL with a message ID")
+
+	messageIDs, err = c.Uidl(50)
+	if err != nil {
+		t.Error(err.Error())
+		return
+	}
+
+	assertEqual(t, len(messageIDs), 1, "incorrect UIDL message count")
+
+	t.Log("Checking UIDL with an invalid message ID")
+
+	if _, err := c.Uidl(51); err == nil {
+		t.Errorf("UIDL 51 should return an error")
+		return
+	}
+
 	t.Log("Deleting 25 messages")
 
 	for i := 1; i <= 25; i++ {
 		if err := c.Dele(i); err != nil {
-			t.Errorf(err.Error())
+			t.Error(err.Error())
 			return
 		}
 	}
 
 	// messages get deleted after a QUIT
 	if err := c.Quit(); err != nil {
-		t.Errorf(err.Error())
+		t.Error(err.Error())
 		return
 	}
 
+	// allow for background delete when using rqlite driver
+	time.Sleep(time.Millisecond * 200)
+
 	c, err = connectAuth()
 	if err != nil {
-		t.Errorf(err.Error())
+		t.Error(err.Error())
 		return
 	}
 
@@ -110,7 +149,7 @@ func TestPOP3(t *testing.T) {
 
 	count, _, err = c.Stat()
 	if err != nil {
-		t.Errorf(err.Error())
+		t.Error(err.Error())
 		return
 	}
 
@@ -118,13 +157,13 @@ func TestPOP3(t *testing.T) {
 
 	// messages get deleted after a QUIT
 	if err := c.Quit(); err != nil {
-		t.Errorf(err.Error())
+		t.Error(err.Error())
 		return
 	}
 
 	c, err = connectAuth()
 	if err != nil {
-		t.Errorf(err.Error())
+		t.Error(err.Error())
 		return
 	}
 
@@ -132,7 +171,7 @@ func TestPOP3(t *testing.T) {
 
 	for i := 1; i <= 25; i++ {
 		if err := c.Dele(i); err != nil {
-			t.Errorf(err.Error())
+			t.Error(err.Error())
 			return
 		}
 	}
@@ -140,31 +179,31 @@ func TestPOP3(t *testing.T) {
 	t.Log("Undeleting messages")
 
 	if err := c.Rset(); err != nil {
-		t.Errorf(err.Error())
+		t.Error(err.Error())
 		return
 	}
 
 	if err := c.Quit(); err != nil {
-		t.Errorf(err.Error())
+		t.Error(err.Error())
 		return
 	}
 
 	c, err = connectAuth()
 	if err != nil {
-		t.Errorf(err.Error())
+		t.Error(err.Error())
 		return
 	}
 
 	count, _, err = c.Stat()
 	if err != nil {
-		t.Errorf(err.Error())
+		t.Error(err.Error())
 		return
 	}
 
 	assertEqual(t, count, 25, "incorrect message count")
 
 	if err := c.Quit(); err != nil {
-		t.Errorf(err.Error())
+		t.Error(err.Error())
 		return
 	}
 }
@@ -187,7 +226,7 @@ func TestAuthentication(t *testing.T) {
 	// non-authenticated connection
 	c, err := connect()
 	if err != nil {
-		t.Errorf(err.Error())
+		t.Error(err.Error())
 		return
 	}
 
@@ -204,7 +243,7 @@ func TestAuthentication(t *testing.T) {
 	}
 
 	if err := c.Quit(); err != nil {
-		t.Errorf(err.Error())
+		t.Error(err.Error())
 		return
 	}
 
@@ -213,7 +252,7 @@ func TestAuthentication(t *testing.T) {
 	// authenticated connection
 	c, err = connectAuth()
 	if err != nil {
-		t.Errorf(err.Error())
+		t.Error(err.Error())
 		return
 	}
 
@@ -230,13 +269,15 @@ func TestAuthentication(t *testing.T) {
 	}
 
 	if err := c.Quit(); err != nil {
-		t.Errorf(err.Error())
+		t.Error(err.Error())
 		return
 	}
 }
 
 func setup() {
-	auth.SetPOP3Auth("username:password")
+	if err := auth.SetPOP3Auth("username:password"); err != nil {
+		panic(err)
+	}
 	logger.NoLogging = true
 	config.MaxMessages = 0
 	config.Database = os.Getenv("MP_DATABASE")
@@ -343,7 +384,7 @@ func insertEmailData(t *testing.T) {
 
 		bufBytes := buf.Bytes()
 
-		id, err := storage.Store(&bufBytes)
+		id, err := storage.Store(&bufBytes, nil)
 		if err != nil {
 			t.Log("error ", err)
 			t.Fail()

internal/pop3/server.go

@@ -80,7 +80,7 @@ func Run() {
 
 type message struct {
 	ID   string
-	Size float64
+	Size uint64
 }
 
 func handleClient(conn net.Conn) {
@@ -211,28 +211,59 @@ func handleClient(conn net.Conn) {
 func handleTransactionCommand(conn net.Conn, cmd string, args []string, messages []message, toDelete *[]string) {
 	switch cmd {
 	case "STAT":
-		totalSize := float64(0)
+		totalSize := uint64(0)
 		for _, m := range messages {
 			totalSize += m.Size
 		}
-		sendResponse(conn, fmt.Sprintf("+OK %d %d", len(messages), int64(totalSize)))
+		sendResponse(conn, fmt.Sprintf("+OK %d %d", len(messages), totalSize))
 	case "LIST":
-		totalSize := float64(0)
+		totalSize := uint64(0)
 		for _, m := range messages {
 			totalSize += m.Size
 		}
-		sendResponse(conn, fmt.Sprintf("+OK %d messages (%d octets)", len(messages), int64(totalSize)))
 
-		for row, m := range messages {
-			sendResponse(conn, fmt.Sprintf("%d %d", row+1, int64(m.Size))) // Convert Size to int64 when printing
+		if len(args) > 0 {
+			arg, _ := getSafeArg(args, 0)
+			nr, err := strconv.Atoi(arg)
+			if err != nil || nr < 1 || nr > len(messages) {
+				sendResponse(conn, "-ERR no such message")
+				return
+			}
+			sendResponse(conn, fmt.Sprintf("+OK %d %d", nr, messages[nr-1].Size))
+		} else {
+			sendResponse(conn, fmt.Sprintf("+OK %d messages (%d octets)", len(messages), totalSize))
+
+			for row, m := range messages {
+				sendResponse(conn, fmt.Sprintf("%d %d", row+1, m.Size))
+			}
+			sendResponse(conn, ".")
 		}
-		sendResponse(conn, ".")
 	case "UIDL":
-		sendResponse(conn, "+OK unique-id listing follows")
-		for row, m := range messages {
-			sendResponse(conn, fmt.Sprintf("%d %s", row+1, m.ID))
+		if len(args) > 1 {
+			sendResponse(conn, "-ERR UIDL takes at most one argument")
+		} else if len(args) == 1 {
+			nr, err := strconv.Atoi(args[0])
+			if err != nil {
+				sendResponse(conn, "-ERR no such message")
+				return
+			}
+
+			if nr < 1 || nr > len(messages) {
+				sendResponse(conn, "-ERR no such message")
+				return
+			}
+
+			m := messages[nr-1]
+
+			sendResponse(conn, fmt.Sprintf("+OK %d %s", nr, m.ID))
+		} else {
+			sendResponse(conn, "+OK unique-id listing follows")
+			for row, m := range messages {
+				sendResponse(conn, fmt.Sprintf("%d %s", row+1, m.ID))
+			}
+			sendResponse(conn, ".")
 		}
-		sendResponse(conn, ".")
+
 	case "RETR":
 		if len(args) != 1 {
 			sendResponse(conn, "-ERR no such message")
@@ -260,7 +291,7 @@ func handleTransactionCommand(conn net.Conn, cmd string, args []string, messages
 		// begins with the termination octet, the line is "byte-stuffed" by
 		// pre-pending the termination octet to that line of the response.
 		// @see: https://www.ietf.org/rfc/rfc1939.txt
-		sendData(conn, strings.Replace(string(raw), "\n.", "\n..", -1))
+		sendData(conn, strings.ReplaceAll(string(raw), "\n.", "\n.."))
 		sendResponse(conn, ".")
 	case "TOP":
 		arg, err := getSafeArg(args, 0)

internal/pop3client/client.go

@@ -422,7 +422,7 @@ func (c *Conn) Noop() error {
 // Message deletions (DELE command) are only executed by the server on a graceful
 // quit and close.
 func (c *Conn) Quit() error {
-	defer c.conn.Close()
+	defer func() { _ = c.conn.Close() }()
 
 	if _, err := c.Cmd("QUIT", false); err != nil {
 		return err

internal/prometheus/metrics.go

@@ -0,0 +1,191 @@
+// Package prometheus provides Prometheus metrics for Mailpit
+package prometheus
+
+import (
+	"net/http"
+	"strings"
+	"time"
+
+	"github.com/axllent/mailpit/config"
+	"github.com/axllent/mailpit/internal/logger"
+	"github.com/axllent/mailpit/internal/stats"
+	"github.com/prometheus/client_golang/prometheus"
+	"github.com/prometheus/client_golang/prometheus/promhttp"
+)
+
+var (
+	// Registry is the Prometheus registry for Mailpit metrics
+	Registry = prometheus.NewRegistry()
+
+	// Metrics
+	totalMessages    prometheus.Gauge
+	unreadMessages   prometheus.Gauge
+	databaseSize     prometheus.Gauge
+	messagesDeleted  prometheus.Counter
+	smtpAccepted     prometheus.Counter
+	smtpRejected     prometheus.Counter
+	smtpIgnored      prometheus.Counter
+	smtpAcceptedSize prometheus.Counter
+	uptime           prometheus.Gauge
+	memoryUsage      prometheus.Gauge
+	tagCounters      *prometheus.GaugeVec
+)
+
+// InitMetrics initializes all Prometheus metrics
+func initMetrics() {
+	// Create metrics
+	totalMessages = prometheus.NewGauge(prometheus.GaugeOpts{
+		Name: "mailpit_messages",
+		Help: "Total number of messages in the database",
+	})
+
+	unreadMessages = prometheus.NewGauge(prometheus.GaugeOpts{
+		Name: "mailpit_messages_unread",
+		Help: "Number of unread messages in the database",
+	})
+
+	databaseSize = prometheus.NewGauge(prometheus.GaugeOpts{
+		Name: "mailpit_database_size_bytes",
+		Help: "Size of the database in bytes",
+	})
+
+	messagesDeleted = prometheus.NewCounter(prometheus.CounterOpts{
+		Name: "mailpit_messages_deleted_total",
+		Help: "Total number of messages deleted",
+	})
+
+	smtpAccepted = prometheus.NewCounter(prometheus.CounterOpts{
+		Name: "mailpit_smtp_accepted_total",
+		Help: "Total number of SMTP messages accepted",
+	})
+
+	smtpRejected = prometheus.NewCounter(prometheus.CounterOpts{
+		Name: "mailpit_smtp_rejected_total",
+		Help: "Total number of SMTP messages rejected",
+	})
+
+	smtpIgnored = prometheus.NewCounter(prometheus.CounterOpts{
+		Name: "mailpit_smtp_ignored_total",
+		Help: "Total number of SMTP messages ignored (duplicates)",
+	})
+
+	smtpAcceptedSize = prometheus.NewCounter(prometheus.CounterOpts{
+		Name: "mailpit_smtp_accepted_size_bytes_total",
+		Help: "Total size of accepted SMTP messages in bytes",
+	})
+
+	uptime = prometheus.NewGauge(prometheus.GaugeOpts{
+		Name: "mailpit_uptime_seconds",
+		Help: "Uptime of Mailpit in seconds",
+	})
+
+	memoryUsage = prometheus.NewGauge(prometheus.GaugeOpts{
+		Name: "mailpit_memory_usage_bytes",
+		Help: "Memory usage in bytes",
+	})
+
+	tagCounters = prometheus.NewGaugeVec(
+		prometheus.GaugeOpts{
+			Name: "mailpit_tag_messages",
+			Help: "Number of messages per tag",
+		},
+		[]string{"tag"},
+	)
+
+	// Register metrics
+	Registry.MustRegister(totalMessages)
+	Registry.MustRegister(unreadMessages)
+	Registry.MustRegister(databaseSize)
+	Registry.MustRegister(messagesDeleted)
+	Registry.MustRegister(smtpAccepted)
+	Registry.MustRegister(smtpRejected)
+	Registry.MustRegister(smtpIgnored)
+	Registry.MustRegister(smtpAcceptedSize)
+	Registry.MustRegister(uptime)
+	Registry.MustRegister(memoryUsage)
+	Registry.MustRegister(tagCounters)
+}
+
+// UpdateMetrics updates all metrics with current values
+func updateMetrics() {
+	info := stats.Load(false)
+
+	totalMessages.Set(float64(info.Messages))
+	unreadMessages.Set(float64(info.Unread))
+	databaseSize.Set(float64(info.DatabaseSize))
+	messagesDeleted.Add(float64(info.RuntimeStats.MessagesDeleted))
+	smtpAccepted.Add(float64(info.RuntimeStats.SMTPAccepted))
+	smtpRejected.Add(float64(info.RuntimeStats.SMTPRejected))
+	smtpIgnored.Add(float64(info.RuntimeStats.SMTPIgnored))
+	smtpAcceptedSize.Add(float64(info.RuntimeStats.SMTPAcceptedSize))
+	uptime.Set(float64(info.RuntimeStats.Uptime))
+	memoryUsage.Set(float64(info.RuntimeStats.Memory))
+
+	// Reset tag counters
+	tagCounters.Reset()
+
+	// Update tag counters
+	for tag, count := range info.Tags {
+		tagCounters.WithLabelValues(tag).Set(float64(count))
+	}
+}
+
+// GetHandler returns the Prometheus handler & disables double compression in middleware
+func GetHandler() http.Handler {
+	return promhttp.HandlerFor(Registry, promhttp.HandlerOpts{
+		DisableCompression: true,
+	})
+}
+
+// StartUpdater starts the periodic metrics update routine
+func StartUpdater() {
+	initMetrics()
+	updateMetrics()
+
+	// Start periodic updates
+	go func() {
+		ticker := time.NewTicker(15 * time.Second)
+		defer ticker.Stop()
+
+		for range ticker.C {
+			updateMetrics()
+		}
+	}()
+}
+
+// StartSeparateServer starts a separate HTTP server for Prometheus metrics
+func StartSeparateServer() {
+	StartUpdater()
+
+	logger.Log().Infof("[prometheus] metrics server listening on %s", config.PrometheusListen)
+
+	// Create a dedicated mux for the metrics server
+	mux := http.NewServeMux()
+	mux.Handle("/metrics", promhttp.HandlerFor(Registry, promhttp.HandlerOpts{}))
+
+	// Create a dedicated server instance
+	server := &http.Server{
+		Addr:              config.PrometheusListen,
+		Handler:           mux,
+		ReadHeaderTimeout: 5 * time.Second,
+	}
+
+	// Start HTTP server
+	if err := server.ListenAndServe(); err != nil {
+		logger.Log().Errorf("[prometheus] metrics server error: %s", err.Error())
+	}
+}
+
+// GetMode returns the Prometheus run mode
+func GetMode() string {
+	mode := strings.ToLower(strings.TrimSpace(config.PrometheusListen))
+
+	switch mode {
+	case "false", "":
+		return "disabled"
+	case "true":
+		return "integrated"
+	default:
+		return "separate"
+	}
+}

internal/smtpd/chaos/chaos.go

@@ -26,7 +26,7 @@ var (
 
 // Triggers for the Chaos configuration
 //
-// swagger:model Triggers
+// swagger:model ChaosTriggers
 type Triggers struct {
 	// Sender trigger to fail on From, Sender
 	Sender Trigger
@@ -37,6 +37,8 @@ type Triggers struct {
 }
 
 // Trigger for Chaos
+//
+// swagger:model ChaosTrigger
 type Trigger struct {
 	// SMTP error code to return. The value must range from 400 to 599.
 	// required: true

internal/smtpd/forward.go

@@ -4,47 +4,88 @@ import (
 	"crypto/tls"
 	"fmt"
 	"net/smtp"
+	"os"
 	"strings"
 
 	"github.com/axllent/mailpit/config"
 	"github.com/axllent/mailpit/internal/logger"
 	"github.com/axllent/mailpit/internal/tools"
+	"github.com/pkg/errors"
 )
 
 // Wrapper to forward messages if configured
-func autoForwardMessage(from string, data *[]byte) {
+func autoForwardMessage(from string, data *[]byte) error {
 	if config.SMTPForwardConfig.Host == "" {
-		return
+		return nil
 	}
 
 	if err := forward(from, *data); err != nil {
-		logger.Log().Errorf("[forward] error: %s", err.Error())
-	} else {
-		logger.Log().Debugf("[forward] message from %s to %s via %s:%d",
-			from, config.SMTPForwardConfig.To, config.SMTPForwardConfig.Host, config.SMTPForwardConfig.Port)
+		return errors.WithMessage(err, "[forward] error: %s")
 	}
+
+	logger.Log().Debugf(
+		"[forward] message from %s to %s via %s:%d",
+		from, config.SMTPForwardConfig.To, config.SMTPForwardConfig.Host, config.SMTPForwardConfig.Port,
+	)
+
+	return nil
+}
+
+func createForwardingSMTPClient(config config.SMTPForwardConfigStruct, addr string) (*smtp.Client, error) {
+	if config.TLS {
+		tlsConf := &tls.Config{ServerName: config.Host} // #nosec
+		tlsConf.InsecureSkipVerify = config.AllowInsecure
+
+		conn, err := tls.Dial("tcp", addr, tlsConf)
+		if err != nil {
+			return nil, fmt.Errorf("TLS dial error: %v", err)
+		}
+
+		client, err := smtp.NewClient(conn, tlsConf.ServerName)
+		if err != nil {
+			_ = conn.Close()
+			return nil, fmt.Errorf("SMTP client error: %v", err)
+		}
+
+		// Note: The caller is responsible for closing the client
+		return client, nil
+	}
+
+	client, err := smtp.Dial(addr)
+	if err != nil {
+		return nil, fmt.Errorf("error connecting to %s: %v", addr, err)
+	}
+
+	// Set the hostname for HELO/EHLO
+	if hostname, err := os.Hostname(); err == nil {
+		if err := client.Hello(hostname); err != nil {
+			return nil, fmt.Errorf("error saying HELO/EHLO to %s: %v", addr, err)
+		}
+	}
+
+	if config.STARTTLS {
+		tlsConf := &tls.Config{ServerName: config.Host} // #nosec
+		tlsConf.InsecureSkipVerify = config.AllowInsecure
+
+		if err = client.StartTLS(tlsConf); err != nil {
+			_ = client.Close()
+			return nil, fmt.Errorf("error creating StartTLS config: %v", err)
+		}
+	}
+
+	// Note: The caller is responsible for closing the client
+	return client, nil
 }
 
 // Forward will connect to a pre-configured SMTP server and send a message to one or more recipients.
 func forward(from string, msg []byte) error {
 	addr := fmt.Sprintf("%s:%d", config.SMTPForwardConfig.Host, config.SMTPForwardConfig.Port)
 
-	c, err := smtp.Dial(addr)
+	c, err := createForwardingSMTPClient(config.SMTPForwardConfig, addr)
 	if err != nil {
-		return fmt.Errorf("error connecting to %s: %s", addr, err.Error())
-	}
-
-	defer c.Close()
-
-	if config.SMTPForwardConfig.STARTTLS {
-		conf := &tls.Config{ServerName: config.SMTPForwardConfig.Host} // #nosec
-
-		conf.InsecureSkipVerify = config.SMTPForwardConfig.AllowInsecure
-
-		if err = c.StartTLS(conf); err != nil {
-			return fmt.Errorf("error creating StartTLS config: %s", err.Error())
-		}
+		return err
 	}
+	defer func() { _ = c.Close() }()
 
 	auth := forwardAuthFromConfig()
 
@@ -72,6 +113,9 @@ func forward(from string, msg []byte) error {
 	for _, addr := range to {
 		if err = c.Rcpt(addr); err != nil {
 			logger.Log().Warnf("error response to RCPT command for %s: %s", addr, err.Error())
+			if config.SMTPForwardConfig.ForwardSMTPErrors {
+				return errors.WithMessagef(err, "error response to RCPT command for %s", addr)
+			}
 		}
 	}
 

internal/smtpd/main.go

@@ -17,6 +17,7 @@ import (
 	"github.com/axllent/mailpit/internal/tools"
 	"github.com/axllent/mailpit/server/websockets"
 	"github.com/lithammer/shortuuid/v4"
+	"github.com/pkg/errors"
 )
 
 var (
@@ -28,13 +29,13 @@ var (
 )
 
 // MailHandler handles the incoming message to store in the database
-func mailHandler(origin net.Addr, from string, to []string, data []byte) (string, error) {
-	return SaveToDatabase(origin, from, to, data)
+func mailHandler(origin net.Addr, from string, to []string, data []byte, smtpUser *string) (string, error) {
+	return SaveToDatabase(origin, from, to, data, smtpUser)
 }
 
 // SaveToDatabase will attempt to save a message to the database
-func SaveToDatabase(origin net.Addr, from string, to []string, data []byte) (string, error) {
-	if !config.SMTPStrictRFCHeaders {
+func SaveToDatabase(origin net.Addr, from string, to []string, data []byte, smtpUser *string) (string, error) {
+	if !config.SMTPStrictRFCHeaders && bytes.Contains(data, []byte("\r\r\n")) {
 		// replace all <CR><CR><LF> (\r\r\n) with <CR><LF> (\r\n)
 		// @see https://github.com/axllent/mailpit/issues/87 & https://github.com/axllent/mailpit/issues/153
 		data = bytes.ReplaceAll(data, []byte("\r\r\n"), []byte("\r\n"))
@@ -50,32 +51,20 @@ func SaveToDatabase(origin net.Addr, from string, to []string, data []byte) (str
 	// check / set the Return-Path based on SMTP from
 	returnPath := strings.Trim(msg.Header.Get("Return-Path"), "<>")
 	if returnPath != from {
-		if returnPath != "" {
-			// replace Return-Path
-			re := regexp.MustCompile(`(?i)(^|\n)(Return\-Path: .*\n)`)
-			replaced := false
-			data = re.ReplaceAllFunc(data, func(r []byte) []byte {
-				if replaced {
-					return r
-				}
-				replaced = true // only replace first occurrence
-
-				return re.ReplaceAll(r, []byte("${1}Return-Path: <"+from+">\r\n"))
-			})
-		} else {
-			// add Return-Path
-			data = append([]byte("Return-Path: <"+from+">\r\n"), data...)
+		data, err = tools.SetMessageHeader(data, "Return-Path", "<"+from+">")
+		if err != nil {
+			return "", err
 		}
 	}
 
-	messageID := strings.Trim(msg.Header.Get("Message-Id"), "<>")
+	messageID := strings.Trim(msg.Header.Get("Message-ID"), "<>")
 
 	// add a message ID if not set
 	if messageID == "" {
 		// generate unique ID
 		messageID = shortuuid.New() + "@mailpit"
 		// add unique ID
-		data = append([]byte("Message-Id: <"+messageID+">\r\n"), data...)
+		data = append([]byte("Message-ID: <"+messageID+">\r\n"), data...)
 	} else if config.IgnoreDuplicateIDs {
 		if storage.MessageIDExists(messageID) {
 			logger.Log().Debugf("[smtpd] duplicate message found, ignoring %s", messageID)
@@ -85,10 +74,36 @@ func SaveToDatabase(origin net.Addr, from string, to []string, data []byte) (str
 	}
 
 	// if enabled, this may conditionally relay the email through to the preconfigured smtp server
-	autoRelayMessage(from, to, &data)
+	if relayErr := autoRelayMessage(from, to, &data); relayErr != nil {
+		logger.Log().Error(relayErr.Error())
+
+		if config.SMTPRelayConfig.ForwardSMTPErrors {
+			for {
+				unwrappedErr := errors.Unwrap(relayErr)
+				if unwrappedErr == nil {
+					break
+				}
+				relayErr = unwrappedErr
+			}
+			return "", relayErr
+		}
+	}
 
 	// if enabled, this will forward a copy to preconfigured addresses
-	autoForwardMessage(from, &data)
+	if forwardErr := autoForwardMessage(from, &data); forwardErr != nil {
+		logger.Log().Error(forwardErr.Error())
+
+		if config.SMTPForwardConfig.ForwardSMTPErrors {
+			for {
+				unwrappedErr := errors.Unwrap(forwardErr)
+				if unwrappedErr == nil {
+					break
+				}
+				forwardErr = unwrappedErr
+			}
+			return "", forwardErr
+		}
+	}
 
 	// build array of all addresses in the header to compare to the []to array
 	emails, hasBccHeader := scanAddressesInHeader(msg.Header)
@@ -108,29 +123,21 @@ func SaveToDatabase(origin net.Addr, from string, to []string, data []byte) (str
 
 	// add missing email addresses to Bcc (eg: Laravel doesn't include these in the headers)
 	if len(missingAddresses) > 0 {
+		bccVal := strings.Join(missingAddresses, ", ")
 		if hasBccHeader {
-			// email already has Bcc header, add to existing addresses
-			re := regexp.MustCompile(`(?i)(^|\n)(Bcc: )`)
-			replaced := false
-			data = re.ReplaceAllFunc(data, func(r []byte) []byte {
-				if replaced {
-					return r
-				}
-				replaced = true // only replace first occurrence
+			b := msg.Header.Get("Bcc")
+			bccVal = ", " + b
+		}
 
-				return re.ReplaceAll(r, []byte("${1}Bcc: "+strings.Join(missingAddresses, ", ")+", "))
-			})
-
-		} else {
-			// prepend new Bcc header
-			bcc := []byte(fmt.Sprintf("Bcc: %s\r\n", strings.Join(missingAddresses, ", ")))
-			data = append(bcc, data...)
+		data, err = tools.SetMessageHeader(data, "Bcc", bccVal)
+		if err != nil {
+			return "", err
 		}
 
 		logger.Log().Debugf("[smtpd] added missing addresses to Bcc header: %s", strings.Join(missingAddresses, ", "))
 	}
 
-	id, err := storage.Store(&data)
+	id, err := storage.Store(&data, smtpUser)
 	if err != nil {
 		logger.Log().Errorf("[db] error storing message: %s", err.Error())
 		return "", err
@@ -214,15 +221,16 @@ func listenAndServe(addr string, handler MsgIDHandler, authHandler AuthHandler)
 
 	Debug = true // to enable Mailpit logging
 	srv := &Server{
-		Addr:              addr,
-		MsgIDHandler:      handler,
-		HandlerRcpt:       handlerRcpt,
-		AppName:           "Mailpit",
-		Hostname:          "",
-		AuthHandler:       nil,
-		AuthRequired:      false,
-		MaxRecipients:     config.SMTPMaxRecipients,
-		DisableReverseDNS: DisableReverseDNS,
+		Addr:                     addr,
+		MsgIDHandler:             handler,
+		HandlerRcpt:              handlerRcpt,
+		AppName:                  "Mailpit",
+		Hostname:                 "",
+		AuthHandler:              nil,
+		AuthRequired:             false,
+		MaxRecipients:            config.SMTPMaxRecipients,
+		IgnoreRejectedRecipients: config.SMTPIgnoreRejectedRecipients,
+		DisableReverseDNS:        DisableReverseDNS,
 		LogRead: func(remoteIP, verb, line string) {
 			logger.Log().Debugf("[smtpd] %s (%s) %s", verbLogTranslator(verb), remoteIP, line)
 		},
@@ -244,15 +252,27 @@ func listenAndServe(addr string, handler MsgIDHandler, authHandler AuthHandler)
 	}
 
 	if config.SMTPAuthAllowInsecure {
-		srv.AuthMechs = map[string]bool{"CRAM-MD5": false, "PLAIN": true, "LOGIN": true}
+		srv.AuthMechs = map[string]bool{
+			"CRAM-MD5": false,
+			"PLAIN":    true,
+			"LOGIN":    true,
+		}
 	}
 
 	if auth.SMTPCredentials != nil {
-		srv.AuthMechs = map[string]bool{"CRAM-MD5": false, "PLAIN": true, "LOGIN": true}
+		srv.AuthMechs = map[string]bool{
+			"CRAM-MD5": false,
+			"PLAIN":    true,
+			"LOGIN":    true,
+		}
 		srv.AuthHandler = authHandler
 		srv.AuthRequired = true
 	} else if config.SMTPAuthAcceptAny {
-		srv.AuthMechs = map[string]bool{"CRAM-MD5": false, "PLAIN": true, "LOGIN": true}
+		srv.AuthMechs = map[string]bool{
+			"CRAM-MD5": false,
+			"PLAIN":    true,
+			"LOGIN":    true,
+		}
 		srv.AuthHandler = authHandlerAny
 	}
 
@@ -282,10 +302,10 @@ func listenAndServe(addr string, handler MsgIDHandler, authHandler AuthHandler)
 		smtpType := "no encryption"
 
 		if config.SMTPTLSCert != "" {
-			if config.SMTPRequireSTARTTLS {
-				smtpType = "STARTTLS required"
-			} else if config.SMTPRequireTLS {
+			if config.SMTPRequireTLS {
 				smtpType = "SSL/TLS required"
+			} else if config.SMTPRequireSTARTTLS {
+				smtpType = "STARTTLS required"
 			} else {
 				smtpType = "STARTTLS optional"
 				if !config.SMTPAuthAllowInsecure && auth.SMTPCredentials != nil {

internal/smtpd/relay.go

@@ -2,18 +2,19 @@ package smtpd
 
 import (
 	"crypto/tls"
-	"errors"
 	"fmt"
 	"net/smtp"
+	"os"
 	"strings"
 
 	"github.com/axllent/mailpit/config"
 	"github.com/axllent/mailpit/internal/logger"
 	"github.com/axllent/mailpit/internal/tools"
+	"github.com/pkg/errors"
 )
 
 // Wrapper to auto relay messages if configured
-func autoRelayMessage(from string, to []string, data *[]byte) {
+func autoRelayMessage(from string, to []string, data *[]byte) error {
 	if config.SMTPRelayConfig.BlockedRecipientsRegexp != nil {
 		filteredTo := []string{}
 		for _, address := range to {
@@ -28,16 +29,18 @@ func autoRelayMessage(from string, to []string, data *[]byte) {
 	}
 
 	if len(to) == 0 {
-		return
+		return nil
 	}
 
 	if config.SMTPRelayAll {
 		if err := Relay(from, to, *data); err != nil {
-			logger.Log().Errorf("[relay] error: %s", err.Error())
-		} else {
-			logger.Log().Debugf("[relay] sent message to %s from %s via %s:%d",
-				strings.Join(to, ", "), from, config.SMTPRelayConfig.Host, config.SMTPRelayConfig.Port)
+			return errors.WithMessage(err, "[relay] error")
 		}
+
+		logger.Log().Debugf(
+			"[relay] sent message to %s from %s via %s:%d",
+			strings.Join(to, ", "), from, config.SMTPRelayConfig.Host, config.SMTPRelayConfig.Port,
+		)
 	} else if config.SMTPRelayMatchingRegexp != nil {
 		filtered := []string{}
 		for _, t := range to {
@@ -47,38 +50,77 @@ func autoRelayMessage(from string, to []string, data *[]byte) {
 		}
 
 		if len(filtered) == 0 {
-			return
+			return nil
 		}
 
 		if err := Relay(from, filtered, *data); err != nil {
-			logger.Log().Errorf("[relay] error: %s", err.Error())
-		} else {
-			logger.Log().Debugf("[relay] auto-relay message to %s from %s via %s:%d",
-				strings.Join(filtered, ", "), from, config.SMTPRelayConfig.Host, config.SMTPRelayConfig.Port)
+			return errors.WithMessage(err, "[relay] error")
+		}
+
+		logger.Log().Debugf(
+			"[relay] auto-relay message to %s from %s via %s:%d",
+			strings.Join(filtered, ", "), from, config.SMTPRelayConfig.Host, config.SMTPRelayConfig.Port,
+		)
+	}
+
+	return nil
+}
+
+func createRelaySMTPClient(config config.SMTPRelayConfigStruct, addr string) (*smtp.Client, error) {
+	if config.TLS {
+		tlsConf := &tls.Config{ServerName: config.Host} // #nosec
+		tlsConf.InsecureSkipVerify = config.AllowInsecure
+
+		conn, err := tls.Dial("tcp", addr, tlsConf)
+		if err != nil {
+			return nil, fmt.Errorf("TLS dial error: %v", err)
+		}
+
+		client, err := smtp.NewClient(conn, tlsConf.ServerName)
+		if err != nil {
+			_ = conn.Close()
+			return nil, fmt.Errorf("SMTP client error: %v", err)
+		}
+
+		// Note: The caller is responsible for closing the client
+		return client, nil
+	}
+
+	client, err := smtp.Dial(addr)
+	if err != nil {
+		return nil, fmt.Errorf("error connecting to %s: %v", addr, err)
+	}
+
+	// Set the hostname for HELO/EHLO
+	if hostname, err := os.Hostname(); err == nil {
+		if err := client.Hello(hostname); err != nil {
+			return nil, fmt.Errorf("error saying HELO/EHLO to %s: %v", addr, err)
 		}
 	}
+
+	if config.STARTTLS {
+		tlsConf := &tls.Config{ServerName: config.Host} // #nosec
+		tlsConf.InsecureSkipVerify = config.AllowInsecure
+
+		if err = client.StartTLS(tlsConf); err != nil {
+			_ = client.Close()
+			return nil, fmt.Errorf("error creating StartTLS config: %v", err)
+		}
+	}
+
+	// Note: The caller is responsible for closing the client
+	return client, nil
 }
 
 // Relay will connect to a pre-configured SMTP server and send a message to one or more recipients.
 func Relay(from string, to []string, msg []byte) error {
 	addr := fmt.Sprintf("%s:%d", config.SMTPRelayConfig.Host, config.SMTPRelayConfig.Port)
 
-	c, err := smtp.Dial(addr)
+	c, err := createRelaySMTPClient(config.SMTPRelayConfig, addr)
 	if err != nil {
-		return fmt.Errorf("error connecting to %s: %s", addr, err.Error())
-	}
-
-	defer c.Close()
-
-	if config.SMTPRelayConfig.STARTTLS {
-		conf := &tls.Config{ServerName: config.SMTPRelayConfig.Host} // #nosec
-
-		conf.InsecureSkipVerify = config.SMTPRelayConfig.AllowInsecure
-
-		if err = c.StartTLS(conf); err != nil {
-			return fmt.Errorf("error creating StartTLS config: %s", err.Error())
-		}
+		return err
 	}
+	defer func() { _ = c.Close() }()
 
 	auth := relayAuthFromConfig()
 
@@ -98,26 +140,29 @@ func Relay(from string, to []string, msg []byte) error {
 	}
 
 	if err = c.Mail(from); err != nil {
-		return fmt.Errorf("error response to MAIL command: %s", err.Error())
+		return errors.WithMessage(err, "error sending MAIL command")
 	}
 
 	for _, addr := range to {
 		if err = c.Rcpt(addr); err != nil {
 			logger.Log().Warnf("error response to RCPT command for %s: %s", addr, err.Error())
+			if config.SMTPRelayConfig.ForwardSMTPErrors {
+				return errors.WithMessagef(err, "error response to RCPT command for %s", addr)
+			}
 		}
 	}
 
 	w, err := c.Data()
 	if err != nil {
-		return fmt.Errorf("error response to DATA command: %s", err.Error())
+		return errors.WithMessage(err, "error response to DATA command")
 	}
 
 	if _, err := w.Write(msg); err != nil {
-		return fmt.Errorf("error sending message: %s", err.Error())
+		return errors.WithMessage(err, "error sending message")
 	}
 
 	if err := w.Close(); err != nil {
-		return fmt.Errorf("error closing connection: %s", err.Error())
+		return errors.WithMessage(err, "error closing connection")
 	}
 
 	return c.Quit()
@@ -150,7 +195,10 @@ type loginAuth struct {
 
 // LoginAuth authentication
 func LoginAuth(username, password string) smtp.Auth {
-	return &loginAuth{username, password}
+	return &loginAuth{
+		username,
+		password,
+	}
 }
 
 func (a *loginAuth) Start(_ *smtp.ServerInfo) (string, []byte, error) {
@@ -165,7 +213,7 @@ func (a *loginAuth) Next(fromServer []byte, more bool) ([]byte, error) {
 		case "Password:":
 			return []byte(a.password), nil
 		default:
-			return nil, errors.New("Unknown fromServer")
+			return nil, errors.New("unknown fromServer")
 		}
 	}
 

internal/smtpd/smtpd.go

@@ -15,6 +15,7 @@ import (
 	"io/fs"
 	"log"
 	"net"
+	"net/mail"
 	"os"
 	"regexp"
 	"strconv"
@@ -42,7 +43,7 @@ type Handler func(remoteAddr net.Addr, from string, to []string, data []byte) er
 
 // MsgIDHandler function called upon successful receipt of an email. Returns a message ID.
 // Results in a "250 2.0.0 Ok: queued as <message-id>" response.
-type MsgIDHandler func(remoteAddr net.Addr, from string, to []string, data []byte) (string, error)
+type MsgIDHandler func(remoteAddr net.Addr, from string, to []string, data []byte, username *string) (string, error)
 
 // HandlerRcpt function called on RCPT. Return accept status.
 type HandlerRcpt func(remoteAddr net.Addr, from string, to string) bool
@@ -92,26 +93,27 @@ type LogFunc func(remoteIP, verb, line string)
 
 // Server is an SMTP server.
 type Server struct {
-	Addr              string // TCP address to listen on, defaults to ":25" (all addresses, port 25) if empty
-	AppName           string
-	AuthHandler       AuthHandler
-	AuthMechs         map[string]bool // Override list of allowed authentication mechanisms. Currently supported: LOGIN, PLAIN, CRAM-MD5. Enabling LOGIN and PLAIN will reduce RFC 4954 compliance.
-	AuthRequired      bool            // Require authentication for every command except AUTH, EHLO, HELO, NOOP, RSET or QUIT as per RFC 4954. Ignored if AuthHandler is not configured.
-	DisableReverseDNS bool            // Disable reverse DNS lookups, enforces "unknown" hostname
-	Handler           Handler
-	HandlerRcpt       HandlerRcpt
-	Hostname          string
-	LogRead           LogFunc
-	LogWrite          LogFunc
-	MaxSize           int // Maximum message size allowed, in bytes
-	MaxRecipients     int // Maximum number of recipients, defaults to 100.
-	MsgIDHandler      MsgIDHandler
-	Timeout           time.Duration
-	TLSConfig         *tls.Config
-	TLSListener       bool        // Listen for incoming TLS connections only (not recommended as it may reduce compatibility). Ignored if TLS is not configured.
-	TLSRequired       bool        // Require TLS for every command except NOOP, EHLO, STARTTLS, or QUIT as per RFC 3207. Ignored if TLS is not configured.
-	Protocol          string      // Default tcp, supports unix
-	SocketPerm        fs.FileMode // if using Unix socket, socket permissions
+	Addr                     string // TCP address to listen on, defaults to ":25" (all addresses, port 25) if empty
+	AppName                  string
+	AuthHandler              AuthHandler
+	AuthMechs                map[string]bool // Override list of allowed authentication mechanisms. Currently supported: LOGIN, PLAIN, CRAM-MD5. Enabling LOGIN and PLAIN will reduce RFC 4954 compliance.
+	AuthRequired             bool            // Require authentication for every command except AUTH, EHLO, HELO, NOOP, RSET or QUIT as per RFC 4954. Ignored if AuthHandler is not configured.
+	DisableReverseDNS        bool            // Disable reverse DNS lookups, enforces "unknown" hostname
+	Handler                  Handler
+	HandlerRcpt              HandlerRcpt
+	Hostname                 string
+	LogRead                  LogFunc
+	LogWrite                 LogFunc
+	MaxSize                  int // Maximum message size allowed, in bytes
+	MaxRecipients            int // Maximum number of recipients, defaults to 100.
+	MsgIDHandler             MsgIDHandler
+	IgnoreRejectedRecipients bool // Accept emails to rejected recipients with 2xx response but silently drop them
+	Timeout                  time.Duration
+	TLSConfig                *tls.Config
+	TLSListener              bool        // Listen for incoming TLS connections only (not recommended as it may reduce compatibility). Ignored if TLS is not configured.
+	TLSRequired              bool        // Require TLS for every command except NOOP, EHLO, STARTTLS, or QUIT as per RFC 3207. Ignored if TLS is not configured.
+	Protocol                 string      // Default tcp, supports unix
+	SocketPerm               fs.FileMode // if using Unix socket, socket permissions
 
 	inShutdown   int32 // server was closed or shutdown
 	openSessions int32 // count of open sessions
@@ -217,7 +219,7 @@ func (srv *Server) Serve(ln net.Listener) error {
 		return ErrServerClosed
 	}
 
-	defer ln.Close()
+	defer func() { _ = ln.Close() }()
 
 	for {
 		// if we are shutting down, don't accept new connections
@@ -229,7 +231,7 @@ func (srv *Server) Serve(ln net.Listener) error {
 
 		conn, err := ln.Accept()
 		if err != nil {
-			if netErr, ok := err.(net.Error); ok && netErr.Temporary() {
+			if netErr, ok := err.(net.Error); ok && netErr.Timeout() {
 				continue
 			}
 			return err
@@ -255,6 +257,7 @@ type session struct {
 	xClientTrust  bool   // Trust XCLIENT from current IP address
 	tls           bool
 	authenticated bool
+	username      *string // username, nil if not authenticated
 }
 
 // Create new session from connection.
@@ -355,13 +358,21 @@ func (srv *Server) Shutdown(ctx context.Context) error {
 // Function called to handle connection requests.
 func (s *session) serve() {
 	defer atomic.AddInt32(&s.srv.openSessions, -1)
-	defer s.conn.Close()
+	// pass the connection into the defer function to ensure it is closed,
+	// otherwise results in a 5s timeout for each connection
+	defer func(c net.Conn) { _ = c.Close() }(s.conn)
 
 	var from string
 	var gotFrom bool
 	var to []string
+	var hasRejectedRecipients bool
 	var buffer bytes.Buffer
 
+	// RFC 5321 specifies support for minimum of 100 recipients is required.
+	if s.srv.MaxRecipients == 0 {
+		s.srv.MaxRecipients = 100
+	}
+
 	// Send banner.
 	s.writef("220 %s %s ESMTP Service ready", s.srv.Hostname, s.srv.AppName)
 
@@ -389,6 +400,7 @@ loop:
 			from = ""
 			gotFrom = false
 			to = nil
+			hasRejectedRecipients = false
 			buffer.Reset()
 		case "EHLO":
 			s.remoteName = args
@@ -398,6 +410,7 @@ loop:
 			from = ""
 			gotFrom = false
 			to = nil
+			hasRejectedRecipients = false
 			buffer.Reset()
 		case "MAIL":
 			if s.srv.TLSConfig != nil && s.srv.TLSRequired && !s.tls {
@@ -409,7 +422,7 @@ loop:
 				break
 			}
 
-			match := mailFromRE.FindStringSubmatch(args)
+			match := extractAndValidateAddress(mailFromRE, args)
 			if match == nil {
 				s.writef("501 5.5.4 Syntax error in parameters or arguments (invalid FROM parameter)")
 			} else {
@@ -449,6 +462,7 @@ loop:
 			}
 
 			to = nil
+			hasRejectedRecipients = false
 			buffer.Reset()
 		case "RCPT":
 			if s.srv.TLSConfig != nil && s.srv.TLSRequired && !s.tls {
@@ -464,7 +478,7 @@ loop:
 				break
 			}
 
-			match := rcptToRE.FindStringSubmatch(args)
+			match := extractAndValidateAddress(rcptToRE, args)
 			if match == nil {
 				s.writef("501 5.5.4 Syntax error in parameters or arguments (invalid TO parameter)")
 			} else {
@@ -474,12 +488,7 @@ loop:
 					break
 				}
 
-				// RFC 5321 specifies support for minimum of 100 recipients is required.
-				if s.srv.MaxRecipients == 0 {
-					s.srv.MaxRecipients = 100
-				}
-
-				if len(to) == s.srv.MaxRecipients {
+				if len(to) >= s.srv.MaxRecipients {
 					s.writef("452 4.5.3 Too many recipients")
 				} else {
 					accept := true
@@ -489,6 +498,9 @@ loop:
 					if accept {
 						to = append(to, match[1])
 						s.writef("250 2.1.5 Ok")
+					} else if s.srv.IgnoreRejectedRecipients {
+						hasRejectedRecipients = true
+						s.writef("250 2.1.5 Ok")
 					} else {
 						s.writef("550 5.1.0 Requested action not taken: mailbox unavailable")
 					}
@@ -503,7 +515,8 @@ loop:
 				s.writef("530 5.7.0 Authentication required")
 				break
 			}
-			if !gotFrom || len(to) == 0 {
+			hasRecipients := len(to) > 0 || hasRejectedRecipients
+			if !gotFrom || !hasRecipients {
 				s.writef("503 5.5.1 Bad sequence of commands (MAIL & RCPT required before DATA)")
 				break
 			}
@@ -516,9 +529,9 @@ loop:
 			// On other errors, allow the client to try again.
 			data, err := s.readData()
 			if err != nil {
-				switch err.(type) {
+				switch err := err.(type) {
 				case net.Error:
-					if err.(net.Error).Timeout() {
+					if err.Timeout() {
 						s.writef("421 4.4.2 %s %s ESMTP Service closing transmission channel after timeout exceeded", s.srv.Hostname, s.srv.AppName)
 					}
 					break loop
@@ -533,11 +546,13 @@ loop:
 
 			// Create Received header & write message body into buffer.
 			buffer.Reset()
-			buffer.Write(s.makeHeaders(to))
+			if len(to) > 0 {
+				buffer.Write(s.makeHeaders(to))
+			}
 			buffer.Write(data)
 
-			// Pass mail on to handler.
-			if s.srv.Handler != nil {
+			// Pass mail on to handler only if there are valid recipients.
+			if len(to) > 0 && s.srv.Handler != nil {
 				err := s.srv.Handler(s.conn.RemoteAddr(), from, to, buffer.Bytes())
 				if err != nil {
 					checkErrFormat := regexp.MustCompile(`^([2-5][0-9]{2})[\s\-](.+)$`)
@@ -549,8 +564,8 @@ loop:
 					break
 				}
 				s.writef("250 2.0.0 Ok: queued")
-			} else if s.srv.MsgIDHandler != nil {
-				msgID, err := s.srv.MsgIDHandler(s.conn.RemoteAddr(), from, to, buffer.Bytes())
+			} else if len(to) > 0 && s.srv.MsgIDHandler != nil {
+				msgID, err := s.srv.MsgIDHandler(s.conn.RemoteAddr(), from, to, buffer.Bytes(), s.username)
 				if err != nil {
 					checkErrFormat := regexp.MustCompile(`^([2-5][0-9]{2})[\s\-](.+)$`)
 					if checkErrFormat.MatchString(err.Error()) {
@@ -567,6 +582,13 @@ loop:
 					s.writef("250 2.0.0 Ok: queued")
 				}
 			} else {
+				if hasRejectedRecipients && Debug {
+					if s.srv.LogWrite != nil {
+						s.srv.LogWrite(s.remoteIP, "DEBUG", "Message from sender silently dropped (rejected recipients)")
+					} else {
+						log.Printf("%s DEBUG Message from sender silently dropped (rejected recipients)", s.remoteIP)
+					}
+				}
 				s.writef("250 2.0.0 Ok: queued")
 			}
 
@@ -574,6 +596,7 @@ loop:
 			from = ""
 			gotFrom = false
 			to = nil
+			hasRejectedRecipients = false
 			buffer.Reset()
 		case "QUIT":
 			s.writef("221 2.0.0 %s %s ESMTP Service closing transmission channel", s.srv.Hostname, s.srv.AppName)
@@ -587,6 +610,7 @@ loop:
 			from = ""
 			gotFrom = false
 			to = nil
+			hasRejectedRecipients = false
 			buffer.Reset()
 		case "NOOP":
 			s.writef("250 2.0.0 Ok")
@@ -663,6 +687,7 @@ loop:
 			from = ""
 			gotFrom = false
 			to = nil
+			hasRejectedRecipients = false
 			buffer.Reset()
 		case "AUTH":
 			if s.srv.TLSConfig != nil && s.srv.TLSRequired && !s.tls {
@@ -748,7 +773,7 @@ func (s *session) writef(format string, args ...interface{}) {
 	}
 
 	line := fmt.Sprintf(format, args...)
-	fmt.Fprintf(s.bw, "%s\r\n", line)
+	_, _ = fmt.Fprintf(s.bw, "%s\r\n", line)
 	_ = s.bw.Flush()
 
 	if Debug {
@@ -883,7 +908,8 @@ func (s *session) makeEHLOResponse() (response string) {
 		}
 	}
 
-	response += "250 ENHANCEDSTATUSCODES"
+	response += "250-ENHANCEDSTATUSCODES\r\n"
+	response += "250 SMTPUTF8" // last entry must use a space instead of a dash
 	return
 }
 
@@ -916,6 +942,12 @@ func (s *session) handleAuthLogin(arg string) (bool, error) {
 
 	// Validate credentials.
 	authenticated, err := s.srv.AuthHandler(s.conn.RemoteAddr(), "LOGIN", username, password, nil)
+	if authenticated {
+		uname := string(username)
+		s.username = &uname
+	} else {
+		s.username = nil
+	}
 
 	return authenticated, err
 }
@@ -944,6 +976,12 @@ func (s *session) handleAuthPlain(arg string) (bool, error) {
 
 	// Validate credentials.
 	authenticated, err := s.srv.AuthHandler(s.conn.RemoteAddr(), "PLAIN", parts[1], parts[2], nil)
+	if authenticated {
+		uname := string(parts[1])
+		s.username = &uname
+	} else {
+		s.username = nil
+	}
 
 	return authenticated, err
 }
@@ -977,3 +1015,33 @@ func (s *session) handleAuthCramMD5() (bool, error) {
 
 	return authenticated, err
 }
+
+// Extract and validate email address from a regex match.
+// This ensures that only RFC 5322 email addresses are accepted (if set).
+func extractAndValidateAddress(re *regexp.Regexp, args string) []string {
+	match := re.FindStringSubmatch(args)
+	if match == nil || strings.Contains(match[1], " ") {
+		return nil
+	}
+
+	// first argument will be the email address, validate it if not empty
+	if match[1] != "" {
+		a, err := mail.ParseAddress(match[1])
+		if err != nil {
+			return nil
+		}
+
+		parts := strings.SplitN(a.Address, "@", 2)
+
+		if len(parts) != 2 {
+			return nil
+		}
+
+		// https://datatracker.ietf.org/doc/html/rfc5321#section-4.5.3.1
+		if len(parts[0]) > 64 || len(parts[1]) > 255 || len(a.Address) > 256 {
+			return nil
+		}
+	}
+
+	return match
+}

internal/smtpd/smtpd_test.go

@@ -12,7 +12,6 @@ import (
 	"fmt"
 	"io"
 	"net"
-	"os"
 	"reflect"
 	"regexp"
 	"strings"
@@ -40,7 +39,7 @@ func newConn(t *testing.T, server *Server) net.Conn {
 
 // Send a command and verify the 3 digit code from the response.
 func cmdCode(t *testing.T, conn net.Conn, cmd string, code string) string {
-	fmt.Fprintf(conn, "%s\r\n", cmd)
+	_, _ = fmt.Fprintf(conn, "%s\r\n", cmd)
 	resp, err := bufio.NewReader(conn).ReadString('\n')
 	if err != nil {
 		t.Fatalf("Failed to read response from test server: %v", err)
@@ -72,7 +71,9 @@ func TestSimpleCommands(t *testing.T) {
 		conn := newConn(t, &Server{})
 		cmdCode(t, conn, tt.cmd, tt.code)
 		cmdCode(t, conn, "QUIT", "221")
-		conn.Close()
+		if err := conn.Close(); err != nil {
+			t.Errorf("Failed to close connection after command %s: %v", tt.cmd, err)
+		}
 	}
 }
 
@@ -90,7 +91,7 @@ func TestCmdHELO(t *testing.T) {
 	cmdCode(t, conn, "DATA", "503")
 
 	cmdCode(t, conn, "QUIT", "221")
-	conn.Close()
+	_ = conn.Close()
 }
 
 func TestCmdEHLO(t *testing.T) {
@@ -103,11 +104,25 @@ func TestCmdEHLO(t *testing.T) {
 	// See RFC 2821 section 4.1.4 for more detail.
 	cmdCode(t, conn, "MAIL FROM:<sender@example.com>", "250")
 	cmdCode(t, conn, "RCPT TO:<recipient@example.com>", "250")
+
+	// test invalid addresses & header injection
+	cmdCode(t, conn, "RCPT TO: <recipientrecipientrecipientrecipientrecipientrecipientrecipientrecipientrecipientrecipientrecipientrecipient@exampleexampleexampleexampleexampleexampleexample.com>", "501") // too long
+	cmdCode(t, conn, "RCPT TO: <recipientrecipientrecipientreciprecipientrecipientrecipientrecipt@exaample.com>", "501")
+	cmdCode(t, conn, "RCPT TO: <recipient@examplexampleexampleexampleexampleexampleexampleexamplexampleexampleexampleexampleexampleexampleexampleexampleexampleexampleexampleexampleexampleexamplexampleexampleexampleexampleexampleexampleexamplexampleexampleexampleexampleexampleexampleexample.com>", "501")
+	cmdCode(t, conn, "RCPT TO: <r@examplexampleexampleexampleexampleexampleexampleexamplexampleexampleexampleexampleexampleexampleexampleexampleexampleexampleexampleexampleexampleexamplexampleexampleexampleexampleexampleexampleexamplexampleexampleexampleexampleexampleexampleexample.com>", "250") // valid
+	cmdCode(t, conn, "RCPT TO:<recipientexample.com>", "501")
+	cmdCode(t, conn, "RCPT TO: <recipientexample.com>", "501")
+	cmdCode(t, conn, "RCPT TO:  <recipientexample.com>", "501")
+	cmdCode(t, conn, "RCPT TO:<recipient\rexample.com>", "501")
+	cmdCode(t, conn, "RCPT TO: <recipient\rexample.com>", "501")
+	cmdCode(t, conn, "RCPT TO:  <recipient\rexample.com>", "501")
+	cmdCode(t, conn, "RCPT TO: <>", "501") // empty address not allowed here
+
 	cmdCode(t, conn, "EHLO host.example.com", "250")
 	cmdCode(t, conn, "DATA", "503")
 
 	cmdCode(t, conn, "QUIT", "221")
-	conn.Close()
+	_ = conn.Close()
 }
 
 func TestCmdRSET(t *testing.T) {
@@ -121,7 +136,7 @@ func TestCmdRSET(t *testing.T) {
 	cmdCode(t, conn, "DATA", "503")
 
 	cmdCode(t, conn, "QUIT", "221")
-	conn.Close()
+	_ = conn.Close()
 }
 
 func TestCmdMAIL(t *testing.T) {
@@ -144,6 +159,21 @@ func TestCmdMAIL(t *testing.T) {
 	// MAIL with seemingly valid but noncompliant FROM arg (double space after the colon) should return 501 syntax error
 	cmdCode(t, conn, "MAIL FROM:  <sender@example.com>", "501")
 
+	// test invalid addresses & header injection
+	cmdCode(t, conn, "MAIL FROM: <sendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersender@exampleexampleexampleexampleexampleexampleexample.com>", "501") // too long
+	cmdCode(t, conn, "MAIL FROM: <sendersendersendersendersendersendersendersendersendersendersender@exaample.com>", "501")
+	cmdCode(t, conn, "MAIL FROM: <sender@examplexampleexampleexampleexampleexampleexampleexamplexampleexampleexampleexampleexampleexampleexampleexampleexampleexampleexampleexampleexampleexamplexampleexampleexampleexampleexampleexampleexamplexampleexampleexampleexampleexampleexampleexample.com>", "501")
+	cmdCode(t, conn, "MAIL FROM: <s@examplexampleexampleexampleexampleexampleexampleexamplexampleexampleexampleexampleexampleexampleexampleexampleexampleexampleexampleexampleexampleexamplexampleexampleexampleexampleexampleexampleexamplexampleexampleexampleexampleexampleexampleexample.com>", "250") // valid
+	cmdCode(t, conn, "MAIL FROM:<sender\rexample.com>", "501")
+	cmdCode(t, conn, "MAIL FROM: <sender\rexample.com>", "501")
+	cmdCode(t, conn, "MAIL FROM:  <sender\rexample.com>", "501")
+	cmdCode(t, conn, "MAIL FROM:<senderexample.com>", "501")
+	cmdCode(t, conn, "MAIL FROM: <senderexample.com>", "501")
+	cmdCode(t, conn, "MAIL FROM:  <senderexample.com>", "501")
+	cmdCode(t, conn, "MAIL FROM: < sender@example.com >", "501")
+	cmdCode(t, conn, "MAIL FROM: < sender@example.com>", "501")
+	cmdCode(t, conn, "MAIL FROM: <sender@example.com >", "501")
+
 	// MAIL with valid SIZE parameter should return 250 Ok
 	cmdCode(t, conn, "MAIL FROM:<sender@example.com> SIZE=1000", "250")
 
@@ -162,7 +192,7 @@ func TestCmdMAIL(t *testing.T) {
 	// TODO: MAIL with invalid AUTH parameter must return 501 syntax error
 
 	cmdCode(t, conn, "QUIT", "221")
-	conn.Close()
+	_ = conn.Close()
 }
 
 func TestCmdMAILMaxSize(t *testing.T) {
@@ -192,7 +222,7 @@ func TestCmdMAILMaxSize(t *testing.T) {
 
 	// Clients should send either RSET or QUIT after receiving 552 (RFC 1870 section 6.2).
 	cmdCode(t, conn, "QUIT", "221")
-	conn.Close()
+	_ = conn.Close()
 }
 
 func TestCmdRCPT(t *testing.T) {
@@ -239,7 +269,24 @@ func TestCmdRCPT(t *testing.T) {
 	cmdCode(t, conn, "RCPT TO:  <recipient@example.com>", "501")
 
 	cmdCode(t, conn, "QUIT", "221")
-	conn.Close()
+	_ = conn.Close()
+}
+
+func TestCmdMaxRecipients(t *testing.T) {
+	conn := newConn(t, &Server{MaxRecipients: 3})
+
+	cmdCode(t, conn, "EHLO host.example.com", "250")
+
+	cmdCode(t, conn, "MAIL FROM:<sender@example.com>", "250")
+
+	cmdCode(t, conn, "RCPT TO: <recipient1@example.com>", "250")
+	cmdCode(t, conn, "RCPT TO: <recipient2@example.com>", "250")
+	cmdCode(t, conn, "RCPT TO: <recipient3@example.com>", "250")
+	cmdCode(t, conn, "RCPT TO: <recipient4@example.com>", "452")
+	cmdCode(t, conn, "RCPT TO: <recipient5@example.com>", "452")
+
+	cmdCode(t, conn, "QUIT", "221")
+	_ = conn.Close()
 }
 
 func TestCmdDATA(t *testing.T) {
@@ -269,7 +316,7 @@ func TestCmdDATA(t *testing.T) {
 	cmdCode(t, conn, "Test message.\r\n.", "250")
 
 	cmdCode(t, conn, "QUIT", "221")
-	conn.Close()
+	_ = conn.Close()
 }
 
 func TestCmdDATAWithMaxSize(t *testing.T) {
@@ -306,7 +353,7 @@ func TestCmdDATAWithMaxSize(t *testing.T) {
 
 	// Clients should send either RSET or QUIT after receiving 552 (RFC 1870 section 6.2).
 	cmdCode(t, conn, "QUIT", "221")
-	conn.Close()
+	_ = conn.Close()
 }
 
 type mockHandler struct {
@@ -330,7 +377,7 @@ func TestCmdDATAWithHandler(t *testing.T) {
 	cmdCode(t, conn, "DATA", "354")
 	cmdCode(t, conn, "Test message.\r\n.", "250")
 	cmdCode(t, conn, "QUIT", "221")
-	conn.Close()
+	_ = conn.Close()
 
 	if m.handlerCalled != 1 {
 		t.Errorf("MailHandler called %d times, want one call", m.handlerCalled)
@@ -347,7 +394,7 @@ func TestCmdDATAWithHandlerError(t *testing.T) {
 	cmdCode(t, conn, "DATA", "354")
 	cmdCode(t, conn, "Test message.\r\n.", "451")
 	cmdCode(t, conn, "QUIT", "221")
-	conn.Close()
+	_ = conn.Close()
 
 	if m.handlerCalled != 1 {
 		t.Errorf("MailHandler called %d times, want one call", m.handlerCalled)
@@ -365,7 +412,7 @@ func TestCmdSTARTTLS(t *testing.T) {
 	cmdCode(t, conn, "STARTTLS FOO", "501")
 
 	cmdCode(t, conn, "QUIT", "221")
-	conn.Close()
+	_ = conn.Close()
 }
 
 func TestCmdSTARTTLSFailure(t *testing.T) {
@@ -394,7 +441,7 @@ func TestCmdSTARTTLSFailure(t *testing.T) {
 	}
 
 	cmdCode(t, conn, "QUIT", "221")
-	tlsConn.Close()
+	_ = tlsConn.Close()
 }
 
 // Utility function to make a valid TLS certificate for use by the server.
@@ -480,7 +527,7 @@ func TestCmdSTARTTLSSuccess(t *testing.T) {
 	cmdCode(t, tlsConn, "STARTTLS", "503")
 
 	cmdCode(t, tlsConn, "QUIT", "221")
-	tlsConn.Close()
+	_ = tlsConn.Close()
 }
 
 func TestCmdSTARTTLSRequired(t *testing.T) {
@@ -531,7 +578,7 @@ func TestCmdSTARTTLSRequired(t *testing.T) {
 	}
 
 	cmdCode(t, tlsConn, "QUIT", "221")
-	tlsConn.Close()
+	_ = tlsConn.Close()
 }
 
 func TestMakeHeaders(t *testing.T) {
@@ -781,8 +828,8 @@ func TestMakeEHLOResponse(t *testing.T) {
 		t.Errorf("AUTH does not appear in the extension list when an AuthHandler is specified")
 	}
 
-	reLogin := regexp.MustCompile("\\bLOGIN\\b")
-	rePlain := regexp.MustCompile("\\bPLAIN\\b")
+	reLogin := regexp.MustCompile(`\bLOGIN\b`)
+	rePlain := regexp.MustCompile(`\bPLAIN\b`)
 
 	// RFC 4954 specifies that, without TLS in use, plaintext authentication mechanisms must not be advertised.
 	s.tls = false
@@ -805,86 +852,86 @@ func TestMakeEHLOResponse(t *testing.T) {
 	}
 }
 
-func createTmpFile(content string) (file *os.File, err error) {
-	file, err = os.CreateTemp("", "")
-	if err != nil {
-		return
-	}
-	_, err = file.Write([]byte(content))
-	if err != nil {
-		return
-	}
-	err = file.Close()
-	return
-}
+// func createTmpFile(content string) (file *os.File, err error) {
+// 	file, err = os.CreateTemp("", "")
+// 	if err != nil {
+// 		return
+// 	}
+// 	_, err = file.Write([]byte(content))
+// 	if err != nil {
+// 		return
+// 	}
+// 	err = file.Close()
+// 	return
+// }
 
-func createTLSFiles() (
-	certFile *os.File,
-	keyFile *os.File,
-	passphrase string,
-	err error,
-) {
-	const certPEM = `-----BEGIN CERTIFICATE-----
-MIIDRzCCAi+gAwIBAgIJAKtg4oViVwv4MA0GCSqGSIb3DQEBCwUAMBQxEjAQBgNV
-BAMMCWxvY2FsaG9zdDAgFw0xODA0MjAxMzMxNTBaGA8yMDg2MDUwODEzMzE1MFow
-FDESMBAGA1UEAwwJbG9jYWxob3N0MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIB
-CgKCAQEA8h7vl0gUquis5jRtcnETyD+8WITZO0s53aIzp0Y+9HXiHW6FGJjbOZjM
-IvozNVni+83QWKumRTgeSzIIW2j4V8iFMSNrvWmhmCKloesXS1aY6H979e01Ve8J
-WAJFRe6vZJd6gC6Z/P+ELU3ie4Vtr1GYfkV7nZ6VFp5/V/5nxGFag5TUlpP5hcoS
-9r2kvXofosVwe3x3udT8SEbv5eBD4bKeVyJs/RLbxSuiU1358Y1cDdVuHjcvfm3c
-ajhheQ4vX9WXsk7LGGhnf1SrrPN/y+IDTXfvoHn+nJh4vMAB4yzQdE1V1N1AB8RA
-0yBVJ6dwxRrSg4BFrNWhj3gfsvrA7wIDAQABo4GZMIGWMB0GA1UdDgQWBBQ4/ncp
-befFuKH1hoYkPqLwuRrPRjAfBgNVHSMEGDAWgBQ4/ncpbefFuKH1hoYkPqLwuRrP
-RjAJBgNVHRMEAjAAMBEGCWCGSAGG+EIBAQQEAwIGQDALBgNVHQ8EBAMCBaAwEwYD
-VR0lBAwwCgYIKwYBBQUHAwEwFAYDVR0RBA0wC4IJbG9jYWxob3N0MA0GCSqGSIb3
-DQEBCwUAA4IBAQBJBetEXiEIzKAEpXGX87j6aUON51Fdf6BiLMCghuGKyhnaOG32
-4KJhtvVoS3ZUKPylh9c2VdItYlhWp76zd7YKk+3xUOixWeTMQHIvCvRGTyFibOPT
-mApwp2pEnJCe4vjUrBaRhiyI+xnB70cWVF2qeernlLUeJA1mfYyQLz+v06ebDWOL
-c/hPVQFB94lEdiyjGO7RZfIe8KwcK48g7iv0LQU4+c9MoWM2ZsVM1AL2tHzokSeA
-u64gDTW4K0Tzx1ab7KmOFXYUjbz/xWuReMt33EwDXAErKCjbVt2T55Qx8UoKzSh1
-tY0KDHdnYOzgsm2HIj2xcJqbeylYQvckNnoC
------END CERTIFICATE-----`
+// func createTLSFiles() (
+// 	certFile *os.File,
+// 	keyFile *os.File,
+// 	passphrase string,
+// 	err error,
+// ) {
+// 	const certPEM = `-----BEGIN CERTIFICATE-----
+// MIIDRzCCAi+gAwIBAgIJAKtg4oViVwv4MA0GCSqGSIb3DQEBCwUAMBQxEjAQBgNV
+// BAMMCWxvY2FsaG9zdDAgFw0xODA0MjAxMzMxNTBaGA8yMDg2MDUwODEzMzE1MFow
+// FDESMBAGA1UEAwwJbG9jYWxob3N0MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIB
+// CgKCAQEA8h7vl0gUquis5jRtcnETyD+8WITZO0s53aIzp0Y+9HXiHW6FGJjbOZjM
+// IvozNVni+83QWKumRTgeSzIIW2j4V8iFMSNrvWmhmCKloesXS1aY6H979e01Ve8J
+// WAJFRe6vZJd6gC6Z/P+ELU3ie4Vtr1GYfkV7nZ6VFp5/V/5nxGFag5TUlpP5hcoS
+// 9r2kvXofosVwe3x3udT8SEbv5eBD4bKeVyJs/RLbxSuiU1358Y1cDdVuHjcvfm3c
+// ajhheQ4vX9WXsk7LGGhnf1SrrPN/y+IDTXfvoHn+nJh4vMAB4yzQdE1V1N1AB8RA
+// 0yBVJ6dwxRrSg4BFrNWhj3gfsvrA7wIDAQABo4GZMIGWMB0GA1UdDgQWBBQ4/ncp
+// befFuKH1hoYkPqLwuRrPRjAfBgNVHSMEGDAWgBQ4/ncpbefFuKH1hoYkPqLwuRrP
+// RjAJBgNVHRMEAjAAMBEGCWCGSAGG+EIBAQQEAwIGQDALBgNVHQ8EBAMCBaAwEwYD
+// VR0lBAwwCgYIKwYBBQUHAwEwFAYDVR0RBA0wC4IJbG9jYWxob3N0MA0GCSqGSIb3
+// DQEBCwUAA4IBAQBJBetEXiEIzKAEpXGX87j6aUON51Fdf6BiLMCghuGKyhnaOG32
+// 4KJhtvVoS3ZUKPylh9c2VdItYlhWp76zd7YKk+3xUOixWeTMQHIvCvRGTyFibOPT
+// mApwp2pEnJCe4vjUrBaRhiyI+xnB70cWVF2qeernlLUeJA1mfYyQLz+v06ebDWOL
+// c/hPVQFB94lEdiyjGO7RZfIe8KwcK48g7iv0LQU4+c9MoWM2ZsVM1AL2tHzokSeA
+// u64gDTW4K0Tzx1ab7KmOFXYUjbz/xWuReMt33EwDXAErKCjbVt2T55Qx8UoKzSh1
+// tY0KDHdnYOzgsm2HIj2xcJqbeylYQvckNnoC
+// -----END CERTIFICATE-----`
 
-	const keyPEM = `-----BEGIN RSA PRIVATE KEY-----
-Proc-Type: 4,ENCRYPTED
-DEK-Info: AES-256-CBC,C16BF8745B2CDB53AC2B1D7609893AA0
+// 	const keyPEM = `-----BEGIN RSA PRIVATE KEY-----
+// Proc-Type: 4,ENCRYPTED
+// DEK-Info: AES-256-CBC,C16BF8745B2CDB53AC2B1D7609893AA0
 
-O13z7Yq7butaJmMfg9wRis9YnIDPsp4coYI6Ud+JGcP7iXoy95QMhovKWx25o1ol
-tvUTsrsG27fHGf9qG02KizApIVtO9c1e0swCWzFrKRQX0JDiZDmilb9xosBNNst1
-BOzOTRZEwFGSOCKZRBfSXyqC93TvLJ3DO9IUnKIeGt7upipvg29b/Dur/fyCy2WV
-bLHXwUTDBm7j49yfoEyGkDjoB2QO9wgcgbacbnQJQ25fTFUwZpZJEJv6o1tRhoYM
-ZMOhC9x1URmdHKN1+z2y5BrB6oNpParfeAMEvs/9FE6jJwYUR28Ql6Mhphfvr9W2
-5Gxd3J65Ao9Vi2I5j5X6aBuNjyhXN3ScLjPG4lVZm9RU/uTPEt81pig/d5nSAjvF
-Nfc08NuG3cnMyJSE/xScJ4D+GtX8U969wO4oKPCR4E/NFyXPR730ppupDFG6hzPD
-PDmiszDtU438JAZ8AuFa1LkbyFnEW6KVD4h7VRr8YDjirCqnkgjNSI6dFY0NQ8H7
-SyexB0lrceX6HZc+oNdAtkX3tYdzY3ExzUM5lSF1dkldnRbApLbqc4uuNIVXhXFM
-dJnoPdKAzM6i+2EeVUxWNdafKDxnjVSHIHzHfIFJLQ4GS5rnz9keRFdyDjQL07tT
-Lu9pPOmsadDXp7oSa81RgoCUfNZeR4jKpCk2BOft0L6ZSqwYFLcQHLIfJaGfn902
-TUOTxHt0KzEUYeYSrXC2a6cyvXAd1YI7lOgy60qG89VHyCc2v5Bs4c4FNUDC/+Dj
-4ZwogaAbSNkLaE0q3sYQRPdxSqLftyX0KitAgE7oGtdzBfe1cdBoozw3U67NEMMT
-6qvk5j7RepPRSrapHtK5pMMdg5XpKFWcOXZ26VHVrDCj4JKdjVb4iyiQi94VveV0
-w9+KcOtyrM7/jbQlCWnXpsIkP8VA/RIgh7CBn/h4oF1sO8ywP25OGQ7VWAVq1R9D
-8bl8GzIdR9PZpFyOxuIac4rPa8tkDeoXKs4cxoao7H/OZO9o9aTB7CJMTL9yv0Kb
-ntWuYxQchE6syoGsOgdGyZhaw4JeFkasDUP5beyNY+278NkzgGTOIMMTXIX46woP
-ehzHKGHXVGf7ZiSFF+zAHMXZRSwNVMkOYwlIoRg1IbvIRbAXqAR6xXQTCVzNG0SU
-cskojycBca1Cz3hDVIKYZd9beDhprVdr2a4K2nft2g2xRNjKPopsaqXx+VPibFUx
-X7542eQ3eAlhkWUuXvt0q5a9WJdjJp9ODA0/d0akF6JQlEHIAyLfoUKB1HYwgUGG
-6uRm651FDAab9U4cVC5PY1hfv/QwzpkNDkzgJAZ5SMOfZhq7IdBcqGd3lzPmq2FP
-Vy1LVZIl3eM+9uJx5TLsBHH6NhMwtNhFCNa/5ksodQYlTvR8IrrgWlYg4EL69vjS
-yt6HhhEN3lFCWvrQXQMp93UklbTlpVt6qcDXiC7HYbs3+EINargRd5Z+xL5i5vkN
-f9k7s0xqhloWNPZcyOXMrox8L81WOY+sP4mVlGcfDRLdEJ8X2ofJpOAcwYCnjsKd
-uEGsi+l2fTj/F+eZLE6sYoMprgJrbfeqtRWFguUgTn7s5hfU0tZ46al5d0vz8fWK
------END RSA PRIVATE KEY-----`
+// O13z7Yq7butaJmMfg9wRis9YnIDPsp4coYI6Ud+JGcP7iXoy95QMhovKWx25o1ol
+// tvUTsrsG27fHGf9qG02KizApIVtO9c1e0swCWzFrKRQX0JDiZDmilb9xosBNNst1
+// BOzOTRZEwFGSOCKZRBfSXyqC93TvLJ3DO9IUnKIeGt7upipvg29b/Dur/fyCy2WV
+// bLHXwUTDBm7j49yfoEyGkDjoB2QO9wgcgbacbnQJQ25fTFUwZpZJEJv6o1tRhoYM
+// ZMOhC9x1URmdHKN1+z2y5BrB6oNpParfeAMEvs/9FE6jJwYUR28Ql6Mhphfvr9W2
+// 5Gxd3J65Ao9Vi2I5j5X6aBuNjyhXN3ScLjPG4lVZm9RU/uTPEt81pig/d5nSAjvF
+// Nfc08NuG3cnMyJSE/xScJ4D+GtX8U969wO4oKPCR4E/NFyXPR730ppupDFG6hzPD
+// PDmiszDtU438JAZ8AuFa1LkbyFnEW6KVD4h7VRr8YDjirCqnkgjNSI6dFY0NQ8H7
+// SyexB0lrceX6HZc+oNdAtkX3tYdzY3ExzUM5lSF1dkldnRbApLbqc4uuNIVXhXFM
+// dJnoPdKAzM6i+2EeVUxWNdafKDxnjVSHIHzHfIFJLQ4GS5rnz9keRFdyDjQL07tT
+// Lu9pPOmsadDXp7oSa81RgoCUfNZeR4jKpCk2BOft0L6ZSqwYFLcQHLIfJaGfn902
+// TUOTxHt0KzEUYeYSrXC2a6cyvXAd1YI7lOgy60qG89VHyCc2v5Bs4c4FNUDC/+Dj
+// 4ZwogaAbSNkLaE0q3sYQRPdxSqLftyX0KitAgE7oGtdzBfe1cdBoozw3U67NEMMT
+// 6qvk5j7RepPRSrapHtK5pMMdg5XpKFWcOXZ26VHVrDCj4JKdjVb4iyiQi94VveV0
+// w9+KcOtyrM7/jbQlCWnXpsIkP8VA/RIgh7CBn/h4oF1sO8ywP25OGQ7VWAVq1R9D
+// 8bl8GzIdR9PZpFyOxuIac4rPa8tkDeoXKs4cxoao7H/OZO9o9aTB7CJMTL9yv0Kb
+// ntWuYxQchE6syoGsOgdGyZhaw4JeFkasDUP5beyNY+278NkzgGTOIMMTXIX46woP
+// ehzHKGHXVGf7ZiSFF+zAHMXZRSwNVMkOYwlIoRg1IbvIRbAXqAR6xXQTCVzNG0SU
+// cskojycBca1Cz3hDVIKYZd9beDhprVdr2a4K2nft2g2xRNjKPopsaqXx+VPibFUx
+// X7542eQ3eAlhkWUuXvt0q5a9WJdjJp9ODA0/d0akF6JQlEHIAyLfoUKB1HYwgUGG
+// 6uRm651FDAab9U4cVC5PY1hfv/QwzpkNDkzgJAZ5SMOfZhq7IdBcqGd3lzPmq2FP
+// Vy1LVZIl3eM+9uJx5TLsBHH6NhMwtNhFCNa/5ksodQYlTvR8IrrgWlYg4EL69vjS
+// yt6HhhEN3lFCWvrQXQMp93UklbTlpVt6qcDXiC7HYbs3+EINargRd5Z+xL5i5vkN
+// f9k7s0xqhloWNPZcyOXMrox8L81WOY+sP4mVlGcfDRLdEJ8X2ofJpOAcwYCnjsKd
+// uEGsi+l2fTj/F+eZLE6sYoMprgJrbfeqtRWFguUgTn7s5hfU0tZ46al5d0vz8fWK
+// -----END RSA PRIVATE KEY-----`
 
-	passphrase = "test"
+// 	passphrase = "test"
 
-	certFile, err = createTmpFile(certPEM)
-	if err != nil {
-		return
-	}
-	keyFile, err = createTmpFile(keyPEM)
-	return
-}
+// 	certFile, err = createTmpFile(certPEM)
+// 	if err != nil {
+// 		return
+// 	}
+// 	keyFile, err = createTmpFile(keyPEM)
+// 	return
+// }
 
 func TestAuthMechs(t *testing.T) {
 	s := session{}
@@ -949,7 +996,7 @@ func TestCmdAUTH(t *testing.T) {
 	cmdCode(t, conn, "AUTH", "502")
 
 	cmdCode(t, conn, "QUIT", "221")
-	conn.Close()
+	_ = conn.Close()
 }
 
 func TestCmdAUTHOptional(t *testing.T) {
@@ -990,7 +1037,7 @@ func TestCmdAUTHOptional(t *testing.T) {
 	cmdCode(t, conn, "*", "501")
 
 	cmdCode(t, conn, "QUIT", "221")
-	conn.Close()
+	_ = conn.Close()
 }
 
 func TestCmdAUTHRequired(t *testing.T) {
@@ -1039,7 +1086,7 @@ func TestCmdAUTHRequired(t *testing.T) {
 	cmdCode(t, conn, "AUTH PLAIN", "504")
 
 	cmdCode(t, conn, "QUIT", "221")
-	conn.Close()
+	_ = conn.Close()
 }
 
 func TestCmdAUTHLOGIN(t *testing.T) {
@@ -1096,7 +1143,7 @@ func TestCmdAUTHLOGIN(t *testing.T) {
 	cmdCode(t, tlsConn, "AUTH CRAM-MD5", "503")
 
 	cmdCode(t, tlsConn, "QUIT", "221")
-	tlsConn.Close()
+	_ = tlsConn.Close()
 }
 
 func TestCmdAUTHLOGINFast(t *testing.T) {
@@ -1148,7 +1195,7 @@ func TestCmdAUTHLOGINFast(t *testing.T) {
 	cmdCode(t, tlsConn, "AUTH CRAM-MD5", "503")
 
 	cmdCode(t, tlsConn, "QUIT", "221")
-	tlsConn.Close()
+	_ = tlsConn.Close()
 }
 
 func TestCmdAUTHPLAIN(t *testing.T) {
@@ -1207,7 +1254,7 @@ func TestCmdAUTHPLAIN(t *testing.T) {
 	cmdCode(t, tlsConn, "AUTH CRAM-MD5", "503")
 
 	cmdCode(t, tlsConn, "QUIT", "221")
-	tlsConn.Close()
+	_ = tlsConn.Close()
 }
 
 func TestCmdAUTHPLAINEmpty(t *testing.T) {
@@ -1266,7 +1313,7 @@ func TestCmdAUTHPLAINEmpty(t *testing.T) {
 	cmdCode(t, tlsConn, "AUTH CRAM-MD5", "503")
 
 	cmdCode(t, tlsConn, "QUIT", "221")
-	tlsConn.Close()
+	_ = tlsConn.Close()
 }
 
 func TestCmdAUTHPLAINFast(t *testing.T) {
@@ -1318,7 +1365,7 @@ func TestCmdAUTHPLAINFast(t *testing.T) {
 	cmdCode(t, tlsConn, "AUTH CRAM-MD5", "503")
 
 	cmdCode(t, tlsConn, "QUIT", "221")
-	tlsConn.Close()
+	_ = tlsConn.Close()
 }
 
 func TestCmdAUTHPLAINFastAndEmpty(t *testing.T) {
@@ -1370,7 +1417,7 @@ func TestCmdAUTHPLAINFastAndEmpty(t *testing.T) {
 	cmdCode(t, tlsConn, "AUTH CRAM-MD5", "503")
 
 	cmdCode(t, tlsConn, "QUIT", "221")
-	tlsConn.Close()
+	_ = tlsConn.Close()
 }
 
 // makeCRAMMD5Response is a helper function to create the CRAM-MD5 hash.
@@ -1440,7 +1487,7 @@ func TestCmdAUTHCRAMMD5(t *testing.T) {
 	cmdCode(t, conn, "AUTH CRAM-MD5", "503")
 
 	cmdCode(t, conn, "QUIT", "221")
-	conn.Close()
+	_ = conn.Close()
 }
 
 func TestCmdAUTHCRAMMD5WithTLS(t *testing.T) {
@@ -1506,7 +1553,7 @@ func TestCmdAUTHCRAMMD5WithTLS(t *testing.T) {
 	cmdCode(t, tlsConn, "AUTH CRAM-MD5", "503")
 
 	cmdCode(t, tlsConn, "QUIT", "221")
-	tlsConn.Close()
+	_ = tlsConn.Close()
 }
 
 // Benchmark the mail handling without the network stack introducing latency.
@@ -1523,17 +1570,17 @@ func BenchmarkReceive(b *testing.B) {
 
 	// Benchmark a full mail transaction.
 	for i := 0; i < b.N; i++ {
-		fmt.Fprintf(clientConn, "%s\r\n", "HELO host.example.com")
+		_, _ = fmt.Fprintf(clientConn, "%s\r\n", "HELO host.example.com")
 		_, _ = reader.ReadString('\n')
-		fmt.Fprintf(clientConn, "%s\r\n", "MAIL FROM:<sender@example.com>")
+		_, _ = fmt.Fprintf(clientConn, "%s\r\n", "MAIL FROM:<sender@example.com>")
 		_, _ = reader.ReadString('\n')
-		fmt.Fprintf(clientConn, "%s\r\n", "RCPT TO:<recipient@example.com>")
+		_, _ = fmt.Fprintf(clientConn, "%s\r\n", "RCPT TO:<recipient@example.com>")
 		_, _ = reader.ReadString('\n')
-		fmt.Fprintf(clientConn, "%s\r\n", "DATA")
+		_, _ = fmt.Fprintf(clientConn, "%s\r\n", "DATA")
 		_, _ = reader.ReadString('\n')
-		fmt.Fprintf(clientConn, "%s\r\n", "Test message.\r\n.")
+		_, _ = fmt.Fprintf(clientConn, "%s\r\n", "Test message.\r\n.")
 		_, _ = reader.ReadString('\n')
-		fmt.Fprintf(clientConn, "%s\r\n", "QUIT")
+		_, _ = fmt.Fprintf(clientConn, "%s\r\n", "QUIT")
 		_, _ = reader.ReadString('\n')
 	}
 }
@@ -1572,11 +1619,180 @@ func TestCmdShutdown(t *testing.T) {
 	cmdCode(t, conn, "QUIT", "221")
 
 	// connection should now be closed
-	fmt.Fprintf(conn, "%s\r\n", "HELO host.example.com")
+	_, _ = fmt.Fprintf(conn, "%s\r\n", "HELO host.example.com")
 	_, err := bufio.NewReader(conn).ReadString('\n')
 	if err != io.EOF {
 		t.Errorf("Expected connection to be closed\n")
 	}
 
-	conn.Close()
+	_ = conn.Close()
+}
+
+type mockDropRejectedHandler struct {
+	handlerCalled int
+	lastFrom      string
+	lastTo        []string
+	msgIDCalled   int
+	lastMsgIDFrom string
+	lastMsgIDTo   []string
+}
+
+func (m *mockDropRejectedHandler) handler(remoteAddr net.Addr, from string, to []string, data []byte) error {
+	m.handlerCalled++
+	m.lastFrom = from
+	m.lastTo = append([]string{}, to...) // copy slice
+	return nil
+}
+
+func (m *mockDropRejectedHandler) msgIDHandler(remoteAddr net.Addr, from string, to []string, data []byte, username *string) (string, error) {
+	m.msgIDCalled++
+	m.lastMsgIDFrom = from
+	m.lastMsgIDTo = append([]string{}, to...) // copy slice
+	return "test-message-id", nil
+}
+
+// Test the IgnoreRejectedRecipients option
+func TestIgnoreRejectedRecipients(t *testing.T) {
+	tests := []struct {
+		name                      string
+		IgnoreRejectedRecipients  bool
+		handlerRcpt               func(net.Addr, string, string) bool
+		rcptCommands              []struct{ addr, expectedCode string }
+		expectedHandlerCalls      int
+		expectedHandlerRecipients []string
+		useMsgIDHandler           bool
+	}{
+		{
+			name:                     "Disabled_DefaultBehavior",
+			IgnoreRejectedRecipients: false,
+			handlerRcpt: func(remoteAddr net.Addr, from string, to string) bool {
+				return !strings.HasSuffix(to, "@rejected.com")
+			},
+			rcptCommands: []struct{ addr, expectedCode string }{
+				{"valid@example.com", "250"},
+				{"invalid@rejected.com", "550"},
+			},
+			expectedHandlerCalls:      1,
+			expectedHandlerRecipients: []string{"valid@example.com"},
+		},
+		{
+			name:                     "Enabled_MixedRecipients",
+			IgnoreRejectedRecipients: true,
+			handlerRcpt: func(remoteAddr net.Addr, from string, to string) bool {
+				return !strings.HasSuffix(to, "@rejected.com")
+			},
+			rcptCommands: []struct{ addr, expectedCode string }{
+				{"valid1@example.com", "250"},
+				{"valid2@example.com", "250"},
+				{"invalid1@rejected.com", "250"}, // Now accepted but dropped
+				{"invalid2@rejected.com", "250"}, // Now accepted but dropped
+			},
+			expectedHandlerCalls:      1,
+			expectedHandlerRecipients: []string{"valid1@example.com", "valid2@example.com"},
+		},
+		{
+			name:                     "Enabled_AllRejected",
+			IgnoreRejectedRecipients: true,
+			handlerRcpt: func(remoteAddr net.Addr, from string, to string) bool {
+				return false // Reject all
+			},
+			rcptCommands: []struct{ addr, expectedCode string }{
+				{"test1@example.com", "250"}, // Accepted but dropped
+				{"test2@example.com", "250"}, // Accepted but dropped
+			},
+			expectedHandlerCalls:      0, // No handler calls since all rejected
+			expectedHandlerRecipients: nil,
+		},
+		{
+			name:                     "Enabled_OnlyValid",
+			IgnoreRejectedRecipients: true,
+			handlerRcpt: func(remoteAddr net.Addr, from string, to string) bool {
+				return strings.HasSuffix(to, "@valid.com")
+			},
+			rcptCommands: []struct{ addr, expectedCode string }{
+				{"user1@valid.com", "250"},
+				{"user2@valid.com", "250"},
+				{"user3@valid.com", "250"},
+			},
+			expectedHandlerCalls:      1,
+			expectedHandlerRecipients: []string{"user1@valid.com", "user2@valid.com", "user3@valid.com"},
+		},
+		{
+			name:                     "Enabled_WithMsgIDHandler",
+			IgnoreRejectedRecipients: true,
+			handlerRcpt: func(remoteAddr net.Addr, from string, to string) bool {
+				return !strings.HasSuffix(to, "@rejected.com")
+			},
+			rcptCommands: []struct{ addr, expectedCode string }{
+				{"valid@example.com", "250"},
+				{"invalid@rejected.com", "250"}, // Accepted but dropped
+			},
+			expectedHandlerCalls:      1,
+			expectedHandlerRecipients: []string{"valid@example.com"},
+			useMsgIDHandler:           true,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			mock := &mockDropRejectedHandler{}
+
+			server := &Server{
+				Hostname:                 "mail.example.com",
+				AppName:                  "TestMail",
+				MaxRecipients:            100,
+				HandlerRcpt:              tt.handlerRcpt,
+				IgnoreRejectedRecipients: tt.IgnoreRejectedRecipients,
+			}
+
+			if tt.useMsgIDHandler {
+				server.MsgIDHandler = mock.msgIDHandler
+			} else {
+				server.Handler = mock.handler
+			}
+
+			conn := newConn(t, server)
+			defer func() { _ = conn.Close() }()
+
+			cmdCode(t, conn, "HELO host.example.com", "250")
+			cmdCode(t, conn, "MAIL FROM:<sender@example.com>", "250")
+
+			// Send RCPT commands
+			for _, rcpt := range tt.rcptCommands {
+				cmdCode(t, conn, "RCPT TO:<"+rcpt.addr+">", rcpt.expectedCode)
+			}
+
+			// Send DATA
+			cmdCode(t, conn, "DATA", "354")
+			cmdCode(t, conn, "Subject: Test\r\n\r\nTest message\r\n.", "250")
+			cmdCode(t, conn, "QUIT", "221")
+
+			// Verify handler calls
+			if tt.useMsgIDHandler {
+				if mock.msgIDCalled != tt.expectedHandlerCalls {
+					t.Errorf("Expected %d MsgIDHandler calls, got %d", tt.expectedHandlerCalls, mock.msgIDCalled)
+				}
+				if tt.expectedHandlerCalls > 0 {
+					if mock.lastMsgIDFrom != "sender@example.com" {
+						t.Errorf("Expected from 'sender@example.com', got '%s'", mock.lastMsgIDFrom)
+					}
+					if !reflect.DeepEqual(mock.lastMsgIDTo, tt.expectedHandlerRecipients) {
+						t.Errorf("Expected recipients %v, got %v", tt.expectedHandlerRecipients, mock.lastMsgIDTo)
+					}
+				}
+			} else {
+				if mock.handlerCalled != tt.expectedHandlerCalls {
+					t.Errorf("Expected %d handler calls, got %d", tt.expectedHandlerCalls, mock.handlerCalled)
+				}
+				if tt.expectedHandlerCalls > 0 {
+					if mock.lastFrom != "sender@example.com" {
+						t.Errorf("Expected from 'sender@example.com', got '%s'", mock.lastFrom)
+					}
+					if !reflect.DeepEqual(mock.lastTo, tt.expectedHandlerRecipients) {
+						t.Errorf("Expected recipients %v, got %v", tt.expectedHandlerRecipients, mock.lastTo)
+					}
+				}
+			}
+		})
+	}
 }

internal/snakeoil/snakeoil.go

@@ -0,0 +1,196 @@
+// Package snakeoil provides functionality to generate a temporary self-signed certificates
+// for testing purposes. It generates a public and private key pair, stores them in the
+// OS's temporary directory, returning the paths to these files.
+package snakeoil
+
+import (
+	"crypto/rand"
+	"crypto/rsa"
+	"crypto/sha256"
+	"crypto/x509"
+	"crypto/x509/pkix"
+	"encoding/base64"
+	"encoding/pem"
+	"errors"
+	"math/big"
+	"os"
+	"strings"
+	"time"
+
+	"github.com/axllent/mailpit/internal/logger"
+	"github.com/axllent/mailpit/internal/tools"
+)
+
+var keys = make(map[string]KeyPair)
+
+// KeyPair holds the public and private key paths for a self-signed certificate.
+type KeyPair struct {
+	Public  string
+	Private string
+}
+
+// Certificates returns all configured self-signed certificates in use,
+// used for file deletion on exit.
+func Certificates() map[string]KeyPair {
+	return keys
+}
+
+// Public returns the path to a generated PEM-encoded RSA public key.
+func Public(str string) string {
+	domains, key, err := parse(str)
+	if err != nil {
+		logger.Log().Errorf("[tls] failed to parse domains: %v", err)
+		return ""
+	}
+
+	if pair, ok := keys[key]; ok {
+		return pair.Public
+	}
+
+	private, public, err := generate(domains)
+	if err != nil {
+		logger.Log().Errorf("[tls] failed to generate public certificate: %v", err)
+		return ""
+	}
+
+	keys[key] = KeyPair{
+		Public:  public,
+		Private: private,
+	}
+
+	return public
+}
+
+// Private returns the path to a generated PEM-encoded RSA private key.
+func Private(str string) string {
+	domains, key, err := parse(str)
+	if err != nil {
+		logger.Log().Errorf("[tls] failed to parse domains: %v", err)
+		return ""
+	}
+
+	if pair, ok := keys[key]; ok {
+		return pair.Private
+	}
+
+	private, public, err := generate(domains)
+	if err != nil {
+		logger.Log().Errorf("[tls] failed to generate public certificate: %v", err)
+		return ""
+	}
+
+	keys[key] = KeyPair{
+		Public:  public,
+		Private: private,
+	}
+
+	return private
+}
+
+// Parse takes the original string input, removes the "sans:" prefix,
+// splits the result into individual domains, and returns a slice of unique domains,
+// along with a unique key that is a comma-separated list of these domains.
+func parse(str string) ([]string, string, error) {
+	// remove "sans:" prefix
+	str = str[5:]
+	var domains []string
+	// split the string by commas and trim whitespace
+	for domain := range strings.SplitSeq(str, ",") {
+		domain = strings.ToLower(strings.TrimSpace(domain))
+		if domain != "" && !tools.InArray(domain, domains) {
+			domains = append(domains, domain)
+		}
+	}
+
+	if len(domains) == 0 {
+		return domains, "", errors.New("no valid domains provided")
+	}
+
+	// generate sha256 hash of the domains to create a unique key
+	hasher := sha256.New()
+	hasher.Write([]byte(strings.Join(domains, ",")))
+	key := base64.URLEncoding.EncodeToString(hasher.Sum(nil))
+
+	return domains, key, nil
+}
+
+// Generate a new self-signed certificate and return a public & private key paths.
+func generate(domains []string) (string, string, error) {
+	logger.Log().Infof("[tls] generating temp self-signed certificate for: %s", strings.Join(domains, ","))
+	key, err := rsa.GenerateKey(rand.Reader, 4096)
+	if err != nil {
+		return "", "", err
+	}
+
+	keyBytes := x509.MarshalPKCS1PrivateKey(key)
+	// PEM encoding of private key
+	keyPEM := pem.EncodeToMemory(
+		&pem.Block{
+			Type:  "RSA PRIVATE KEY",
+			Bytes: keyBytes,
+		},
+	)
+
+	notBefore := time.Now()
+	notAfter := notBefore.Add(365 * 24 * time.Hour)
+
+	// create certificate template
+	template := x509.Certificate{
+		SerialNumber: big.NewInt(0),
+		Subject: pkix.Name{
+			CommonName:   domains[0],
+			Organization: []string{"Mailpit self-signed certificate"},
+		},
+		DNSNames:              domains,
+		SignatureAlgorithm:    x509.SHA256WithRSA,
+		NotBefore:             notBefore,
+		NotAfter:              notAfter,
+		BasicConstraintsValid: true,
+		KeyUsage:              x509.KeyUsageDigitalSignature | x509.KeyUsageKeyAgreement | x509.KeyUsageKeyEncipherment | x509.KeyUsageDataEncipherment,
+		ExtKeyUsage:           []x509.ExtKeyUsage{x509.ExtKeyUsageServerAuth, x509.ExtKeyUsageClientAuth},
+	}
+
+	// create certificate using template
+	derBytes, err := x509.CreateCertificate(rand.Reader, &template, &template, &key.PublicKey, key)
+	if err != nil {
+		return "", "", err
+
+	}
+
+	// PEM encoding of certificate
+	certPem := pem.EncodeToMemory(
+		&pem.Block{
+			Type:  "CERTIFICATE",
+			Bytes: derBytes,
+		},
+	)
+
+	// Store the paths to the generated keys
+	priv, err := os.CreateTemp("", ".mailpit-*-private.pem")
+	if err != nil {
+		return "", "", err
+	}
+
+	if _, err := priv.Write(keyPEM); err != nil {
+		return "", "", err
+	}
+
+	if err := priv.Close(); err != nil {
+		return "", "", err
+	}
+
+	pub, err := os.CreateTemp("", ".mailpit-*-public.pem")
+	if err != nil {
+		return "", "", err
+	}
+
+	if _, err := pub.Write(certPem); err != nil {
+		return "", "", err
+	}
+
+	if err := pub.Close(); err != nil {
+		return "", "", err
+	}
+
+	return priv.Name(), pub.Name(), nil
+}

internal/spamassassin/postmark/postmark.go

@@ -59,7 +59,7 @@ func Check(email []byte, timeout int) (Response, error) {
 		return r, err
 	}
 
-	defer resp.Body.Close()
+	defer func() { _ = resp.Body.Close() }()
 
 	err = json.NewDecoder(resp.Body).Decode(&r)
 

internal/spamassassin/spamassassin.go

@@ -57,13 +57,6 @@ func SetService(s string) {
 	}
 }
 
-// SetTimeout defines the timeout
-func SetTimeout(t int) {
-	if t > 0 {
-		timeout = t
-	}
-}
-
 // Ping returns whether a service is active or not
 func Ping() error {
 	if service == "postmark" {

internal/spamassassin/spamc/spamc.go

@@ -70,21 +70,22 @@ type Result struct {
 
 // dial connects to spamd through TCP or a Unix socket.
 func (c *Client) dial() (connection, error) {
-	if c.net == "tcp" {
+	switch c.net {
+	case "tcp":
 		tcpAddr, err := net.ResolveTCPAddr("tcp", c.addr)
 		if err != nil {
 			return nil, err
 		}
 		return net.DialTCP("tcp", nil, tcpAddr)
-	} else if c.net == "unix" {
+	case "unix":
 		unixAddr, err := net.ResolveUnixAddr("unix", c.addr)
 		if err != nil {
 			return nil, err
 		}
 		return net.DialUnix("unix", nil, unixAddr)
+	default:
+		return nil, fmt.Errorf("unsupported network type: %s", c.net)
 	}
-
-	panic("Client.net must be either \"tcp\" or \"unix\"")
 }
 
 // Report checks if message is spam or not, and returns score plus report
@@ -103,7 +104,7 @@ func (c *Client) report(email []byte) ([]string, error) {
 		return nil, err
 	}
 
-	defer conn.Close()
+	defer func() { _ = conn.Close() }()
 
 	if err := conn.SetDeadline(time.Now().Add(time.Duration(c.timeout) * time.Second)); err != nil {
 		return nil, err
@@ -221,7 +222,7 @@ func (c *Client) Ping() error {
 	if err != nil {
 		return err
 	}
-	defer conn.Close()
+	defer func() { _ = conn.Close() }()
 
 	if err := conn.SetDeadline(time.Now().Add(time.Duration(c.timeout) * time.Second)); err != nil {
 		return err

internal/stats/stats.go

@@ -7,23 +7,36 @@ import (
 	"time"
 
 	"github.com/axllent/mailpit/config"
+	"github.com/axllent/mailpit/internal/logger"
 	"github.com/axllent/mailpit/internal/storage"
-	"github.com/axllent/mailpit/internal/updater"
+	"github.com/axllent/mailpit/internal/tools"
 )
 
+// Stores cached version  along with its expiry time and error count.
+// Used to minimize repeated version lookups and track consecutive errors.
+type versionCache struct {
+	// github version string
+	value string
+	// time to expire the cache
+	expiry time.Time
+	// count of consecutive errors
+	errCount int
+}
+
 var (
-	// to prevent hammering Github for latest version
-	latestVersionCache string
+	// Version cache storing the latest GitHub version
+	vCache versionCache
 
 	// StartedAt is set to the current ime when Mailpit starts
 	startedAt time.Time
 
+	// sync mutex to prevent race condition with simultaneous requests
 	mu sync.RWMutex
 
-	smtpAccepted     float64
-	smtpAcceptedSize float64
-	smtpRejected     float64
-	smtpIgnored      float64
+	smtpAccepted     uint64
+	smtpAcceptedSize uint64
+	smtpRejected     uint64
+	smtpIgnored      uint64
 )
 
 // AppInformation struct
@@ -36,34 +49,40 @@ type AppInformation struct {
 	// Database path
 	Database string
 	// Database size in bytes
-	DatabaseSize float64
+	DatabaseSize uint64
 	// Total number of messages in the database
-	Messages float64
+	Messages uint64
 	// Total number of messages in the database
-	Unread float64
+	Unread uint64
 	// Tags and message totals per tag
 	Tags map[string]int64
 	// Runtime statistics
 	RuntimeStats struct {
 		// Mailpit server uptime in seconds
-		Uptime float64
+		Uptime uint64
 		// Current memory usage in bytes
 		Memory uint64
 		// Database runtime messages deleted
-		MessagesDeleted float64
+		MessagesDeleted uint64
 		// Accepted runtime SMTP messages
-		SMTPAccepted float64
+		SMTPAccepted uint64
 		// Total runtime accepted messages size in bytes
-		SMTPAcceptedSize float64
+		SMTPAcceptedSize uint64
 		// Rejected runtime SMTP messages
-		SMTPRejected float64
+		SMTPRejected uint64
 		// Ignored runtime SMTP messages (when using --ignore-duplicate-ids)
-		SMTPIgnored float64
+		SMTPIgnored uint64
 	}
 }
 
+// Calculates exponential backoff duration based on the error count.
+func getBackoff(errCount int) time.Duration {
+	backoff := min(time.Duration(1<<errCount)*time.Minute, 30*time.Minute)
+	return backoff
+}
+
 // Load the current statistics
-func Load() AppInformation {
+func Load(detectLatestVersion bool) AppInformation {
 	info := AppInformation{}
 	info.Version = config.Version
 
@@ -71,26 +90,42 @@ func Load() AppInformation {
 	runtime.ReadMemStats(&m)
 
 	info.RuntimeStats.Memory = m.Sys - m.HeapReleased
-	info.RuntimeStats.Uptime = time.Since(startedAt).Seconds()
+	info.RuntimeStats.Uptime = uint64(time.Since(startedAt).Seconds())
 	info.RuntimeStats.MessagesDeleted = storage.StatsDeleted
 	info.RuntimeStats.SMTPAccepted = smtpAccepted
 	info.RuntimeStats.SMTPAcceptedSize = smtpAcceptedSize
 	info.RuntimeStats.SMTPRejected = smtpRejected
 	info.RuntimeStats.SMTPIgnored = smtpIgnored
 
-	if latestVersionCache != "" {
-		info.LatestVersion = latestVersionCache
-	} else {
-		latest, _, _, err := updater.GithubLatest(config.Repo, config.RepoBinaryName)
-		if err == nil {
-			info.LatestVersion = latest
-			latestVersionCache = latest
+	if config.DisableVersionCheck {
+		info.LatestVersion = "disabled"
+	} else if detectLatestVersion {
+		mu.RLock()
+		cacheValid := time.Now().Before(vCache.expiry)
+		cacheValue := vCache.value
+		mu.RUnlock()
 
-			// clear latest version cache after 5 minutes
-			go func() {
-				time.Sleep(5 * time.Minute)
-				latestVersionCache = ""
-			}()
+		if cacheValid {
+			info.LatestVersion = cacheValue
+		} else {
+			mu.Lock()
+			// Re-check after acquiring write lock in case another goroutine refreshed it
+			if time.Now().Before(vCache.expiry) {
+				info.LatestVersion = vCache.value
+			} else {
+				latest, err := config.GHRUConfig.Latest()
+				if err == nil {
+					vCache = versionCache{value: latest.Tag, expiry: time.Now().Add(15 * time.Minute)}
+					info.LatestVersion = latest.Tag
+				} else {
+					logger.Log().Errorf("Failed to fetch latest version: %v", err)
+					vCache.errCount++
+					vCache.value = ""
+					vCache.expiry = time.Now().Add(getBackoff(vCache.errCount))
+					info.LatestVersion = ""
+				}
+			}
+			mu.Unlock()
 		}
 	}
 
@@ -112,7 +147,7 @@ func Track() {
 func LogSMTPAccepted(size int) {
 	mu.Lock()
 	smtpAccepted = smtpAccepted + 1
-	smtpAcceptedSize = smtpAcceptedSize + float64(size)
+	smtpAcceptedSize = smtpAcceptedSize + tools.SafeUint64(size)
 	mu.Unlock()
 }
 

internal/storage/cron.go

@@ -32,7 +32,7 @@ func dbCron() {
 				if total == 0 {
 					deletedPercent = 100
 				} else {
-					deletedPercent = deletedSize * 100 / total
+					deletedPercent = float64(deletedSize * 100 / total)
 				}
 				// only vacuum the DB if at least 1% of mail storage size has been deleted
 				if deletedPercent >= 1 {
@@ -56,24 +56,23 @@ func pruneMessages() {
 	start := time.Now()
 
 	ids := []string{}
-	var prunedSize int64
-	var size float64
+	var prunedSize uint64
+	var size float64 // use float64 for rqlite compatibility
 
 	// prune using `--max` if set
-	if config.MaxMessages > 0 {
-		total := CountTotal()
-		if total > float64(config.MaxAgeInHours) {
-			offset := config.MaxMessages
-			if config.DemoMode {
-				offset = 500
-			}
-			q := sqlf.Select("ID, Size").
-				From(tenant("mailbox")).
-				OrderBy("Created DESC").
-				Limit(5000).
-				Offset(offset)
+	if config.MaxMessages > 0 && CountTotal() > uint64(config.MaxMessages) {
+		offset := config.MaxMessages
+		if config.DemoMode {
+			offset = 500
+		}
+		q := sqlf.Select("ID, Size").
+			From(tenant("mailbox")).
+			OrderBy("Created DESC").
+			Limit(5000).
+			Offset(offset)
 
-			if err := q.QueryAndClose(context.TODO(), db, func(row *sql.Rows) {
+		if err := q.QueryAndClose(
+			context.TODO(), db, func(row *sql.Rows) {
 				var id string
 
 				if err := row.Scan(&id, &size); err != nil {
@@ -81,12 +80,12 @@ func pruneMessages() {
 					return
 				}
 				ids = append(ids, id)
-				prunedSize = prunedSize + int64(size)
+				prunedSize = prunedSize + uint64(size)
 
-			}); err != nil {
-				logger.Log().Errorf("[db] %s", err.Error())
-				return
-			}
+			},
+		); err != nil {
+			logger.Log().Errorf("[db] %s", err.Error())
+			return
 		}
 	}
 
@@ -110,7 +109,7 @@ func pruneMessages() {
 
 			if !tools.InArray(id, ids) {
 				ids = append(ids, id)
-				prunedSize = prunedSize + int64(size)
+				prunedSize = prunedSize + uint64(size)
 			}
 
 		}); err != nil {

internal/storage/database.go

@@ -27,12 +27,11 @@ import (
 
 var (
 	db           *sql.DB
-	dbFile       string
 	sqlDriver    string
 	dbLastAction time.Time
 
 	// zstd compression encoder & decoder
-	dbEncoder, _ = zstd.NewWriter(nil)
+	dbEncoder    *zstd.Encoder
 	dbDecoder, _ = zstd.NewReader(nil)
 
 	temporaryFiles = []string{}
@@ -40,11 +39,31 @@ var (
 
 // InitDB will initialise the database
 func InitDB() error {
+	// dbEncoder
 	var (
 		dsn string
 		err error
 	)
 
+	if config.Compression > 0 {
+		var compression zstd.EncoderLevel
+		switch config.Compression {
+		case 1:
+			compression = zstd.SpeedFastest
+		case 2:
+			compression = zstd.SpeedDefault
+		case 3:
+			compression = zstd.SpeedBestCompression
+		}
+		dbEncoder, err = zstd.NewWriter(nil, zstd.WithEncoderLevel(compression))
+		if err != nil {
+			return err
+		}
+		logger.Log().Debugf("[db] storing messages with compression: %s", compression.String())
+	} else {
+		logger.Log().Debug("[db] storing messages with no compression")
+	}
+
 	p := config.Database
 
 	if p == "" {
@@ -100,8 +119,13 @@ func InitDB() error {
 	db.SetMaxOpenConns(1)
 
 	if sqlDriver == "sqlite" {
-		// SQLite performance tuning (https://phiresky.github.io/blog/2020/sqlite-performance-tuning/)
-		_, err = db.Exec("PRAGMA journal_mode = WAL; PRAGMA synchronous = normal;")
+		if config.DisableWAL {
+			// disable WAL mode for SQLite, allows NFS mounted DBs
+			_, err = db.Exec("PRAGMA journal_mode=DELETE; PRAGMA synchronous=NORMAL;")
+		} else {
+			// SQLite performance tuning (https://phiresky.github.io/blog/2020/sqlite-performance-tuning/)
+			_, err = db.Exec("PRAGMA journal_mode=WAL; PRAGMA synchronous=NORMAL;")
+		}
 		if err != nil {
 			return err
 		}
@@ -114,7 +138,6 @@ func InitDB() error {
 
 	LoadTagFilters()
 
-	dbFile = p
 	dbLastAction = time.Now()
 
 	sigs := make(chan os.Signal, 1)
@@ -185,65 +208,51 @@ func StatsGet() MailboxStats {
 }
 
 // CountTotal returns the number of emails in the database
-func CountTotal() float64 {
-	var total float64
+func CountTotal() uint64 {
+	var total float64 // use float64 for rqlite compatibility
 
 	_ = sqlf.From(tenant("mailbox")).
 		Select("COUNT(*)").To(&total).
 		QueryRowAndClose(context.TODO(), db)
 
-	return total
+	return uint64(total)
 }
 
 // CountUnread returns the number of emails in the database that are unread.
-func CountUnread() float64 {
-	var total float64
+func CountUnread() uint64 {
+	var total float64 // use float64 for rqlite compatibility
 
 	_ = sqlf.From(tenant("mailbox")).
 		Select("COUNT(*)").To(&total).
 		Where("Read = ?", 0).
 		QueryRowAndClose(context.TODO(), db)
 
-	return total
+	return uint64(total)
 }
 
 // CountRead returns the number of emails in the database that are read.
-func CountRead() float64 {
-	var total float64
+func CountRead() uint64 {
+	var total float64 // use float64 for rqlite compatibility
 
 	_ = sqlf.From(tenant("mailbox")).
 		Select("COUNT(*)").To(&total).
 		Where("Read = ?", 1).
 		QueryRowAndClose(context.TODO(), db)
 
-	return total
+	return uint64(total)
 }
 
 // DbSize returns the size of the SQLite database.
-func DbSize() float64 {
-	var total sql.NullFloat64
+func DbSize() uint64 {
+	var total sql.NullFloat64 // use float64 for rqlite compatibility
 
 	err := db.QueryRow("SELECT page_count * page_size AS size FROM pragma_page_count(), pragma_page_size()").Scan(&total)
 
 	if err != nil {
 		logger.Log().Errorf("[db] %s", err.Error())
-		return total.Float64
 	}
 
-	return total.Float64
-}
-
-// IsUnread returns whether a message is unread or not.
-func IsUnread(id string) bool {
-	var unread int
-
-	_ = sqlf.From(tenant("mailbox")).
-		Select("COUNT(*)").To(&unread).
-		Where("Read = ?", 0).
-		Where("ID = ?", id).
-		QueryRowAndClose(context.TODO(), db)
-
-	return unread == 1
+	return uint64(total.Float64)
 }
 
 // MessageIDExists checks whether a Message-ID exists in the DB

internal/storage/functions_test.go

@@ -59,11 +59,11 @@ func assertEqual(t *testing.T, a interface{}, b interface{}, message string) {
 
 func assertEqualStats(t *testing.T, total int, unread int) {
 	s := StatsGet()
-	if float64(total) != s.Total {
+	if uint64(total) != s.Total {
 		t.Fatalf("Incorrect total mailbox stats: \"%v\" != \"%v\"", total, s.Total)
 	}
 
-	if float64(unread) != s.Unread {
+	if uint64(unread) != s.Unread {
 		t.Fatalf("Incorrect unread mailbox stats: \"%v\" != \"%v\"", unread, s.Unread)
 	}
 }

internal/storage/messages.go

@@ -19,14 +19,15 @@ import (
 	"github.com/axllent/mailpit/internal/tools"
 	"github.com/axllent/mailpit/server/webhook"
 	"github.com/axllent/mailpit/server/websockets"
-	"github.com/jhillyerd/enmime"
+	"github.com/jhillyerd/enmime/v2"
 	"github.com/leporo/sqlf"
 	"github.com/lithammer/shortuuid/v4"
 )
 
 // Store will save an email to the database tables.
+// The username is the authentication username of either the SMTP or HTTP client (blank for none).
 // Returns the database ID of the saved message.
-func Store(body *[]byte) (string, error) {
+func Store(body *[]byte, username *string) (string, error) {
 	parser := enmime.NewParser(enmime.DisableCharacterDetection(true))
 
 	// Parse message body with enmime
@@ -44,13 +45,16 @@ func Store(body *[]byte) (string, error) {
 		from = &mail.Address{Name: env.GetHeader("From")}
 	}
 
-	obj := DBMailSummary{
+	obj := Metadata{
 		From:    from,
 		To:      addressToSlice(env, "To"),
 		Cc:      addressToSlice(env, "Cc"),
 		Bcc:     addressToSlice(env, "Bcc"),
 		ReplyTo: addressToSlice(env, "Reply-To"),
 	}
+	if username != nil {
+		obj.Username = *username
+	}
 
 	messageID := strings.Trim(env.GetHeader("Message-ID"), "<>")
 	created := time.Now()
@@ -82,17 +86,17 @@ func Store(body *[]byte) (string, error) {
 	}
 
 	// roll back if it fails
-	defer tx.Rollback()
+	defer func() { _ = tx.Rollback() }()
 
 	subject := env.GetHeader("Subject")
-	size := float64(len(*body))
+	size := uint64(len(*body))
 	inline := len(env.Inlines)
 	attachments := len(env.Attachments)
 	snippet := tools.CreateSnippet(env.Text, env.HTML)
 
 	sql := fmt.Sprintf(`INSERT INTO %s 
-		(Created, ID, MessageID, Subject, Metadata, Size, Inline, Attachments, SearchText, Read, Snippet) 
-		VALUES(?,?,?,?,?,?,?,?,?,0,?)`,
+    	(Created, ID, MessageID, Subject, Metadata, Size, Inline, Attachments, SearchText, Read, Snippet) 
+	    VALUES(?,?,?,?,?,?,?,?,?,0,?)`,
 		tenant("mailbox"),
 	) // #nosec
 
@@ -102,10 +106,23 @@ func Store(body *[]byte) (string, error) {
 		return "", err
 	}
 
-	// insert compressed raw message
-	encoded := dbEncoder.EncodeAll(*body, make([]byte, 0, int(size)))
-	hexStr := hex.EncodeToString(encoded)
-	_, err = tx.Exec(fmt.Sprintf(`INSERT INTO %s (ID, Email) VALUES(?, x'%s')`, tenant("mailbox_data"), hexStr), id) // #nosec
+	if config.Compression > 0 {
+		// insert compressed raw message
+		compressed := dbEncoder.EncodeAll(*body, make([]byte, 0, size))
+
+		if sqlDriver == "rqlite" {
+			// rqlite does not support binary data in query, so we need to encode the compressed message into hexadecimal
+			// string and then generate the SQL query, which is more memory intensive, especially with large messages
+			hexStr := hex.EncodeToString(compressed)
+			_, err = tx.Exec(fmt.Sprintf(`INSERT INTO %s (ID, Email, Compressed) VALUES(?, x'%s', 1)`, tenant("mailbox_data"), hexStr), id) // #nosec
+		} else {
+			_, err = tx.Exec(fmt.Sprintf(`INSERT INTO %s (ID, Email, Compressed) VALUES(?, ?, 1)`, tenant("mailbox_data")), id, compressed) // #nosec
+		}
+	} else {
+		// insert uncompressed raw message
+		_, err = tx.Exec(fmt.Sprintf(`INSERT INTO %s (ID, Email, Compressed) VALUES(?, ?, 0)`, tenant("mailbox_data")), id, string(*body)) // #nosec
+	}
+
 	if err != nil {
 		return "", err
 	}
@@ -130,6 +147,11 @@ func Store(body *[]byte) (string, error) {
 		tags = append(tags, obj.tagsFromPlusAddresses()...)
 	}
 
+	// auto-tag by username if enabled
+	if config.TagsUsername && username != nil && *username != "" {
+		tags = append(tags, *username)
+	}
+
 	// extract tags from search matches, and sort and extract unique tags
 	tags = sortedUniqueTags(append(tags, tagFilterMatches(id)...))
 
@@ -146,6 +168,24 @@ func Store(body *[]byte) (string, error) {
 		return "", err
 	}
 
+	// we do not want to to broadcast null values for MetaData else this does not align
+	// with the message summary documented in the API docs, so we set them to empty slices.
+	if c.From == nil {
+		c.From = &mail.Address{}
+	}
+	if c.To == nil {
+		c.To = []*mail.Address{}
+	}
+	if c.Cc == nil {
+		c.Cc = []*mail.Address{}
+	}
+	if c.Bcc == nil {
+		c.Bcc = []*mail.Address{}
+	}
+	if c.ReplyTo == nil {
+		c.ReplyTo = []*mail.Address{}
+	}
+
 	c.Created = created
 	c.ID = id
 	c.MessageID = messageID
@@ -162,7 +202,7 @@ func Store(body *[]byte) (string, error) {
 
 	BroadcastMailboxStats()
 
-	logger.Log().Debugf("[db] saved message %s (%d bytes)", id, int64(size))
+	logger.Log().Debugf("[db] saved message %s (%d bytes)", id, size)
 
 	return id, nil
 }
@@ -175,41 +215,52 @@ func List(start int, beforeTS int64, limit int) ([]MessageSummary, error) {
 
 	q := sqlf.From(tenant("mailbox") + " m").
 		Select(`m.Created, m.ID, m.MessageID, m.Subject, m.Metadata, m.Size, m.Attachments, m.Read, m.Snippet`).
-		OrderBy("m.Created DESC").
-		Limit(limit).
-		Offset(start)
+		OrderBy("m.Created DESC")
+
+	if limit > 0 {
+		q = q.Limit(limit).Offset(start)
+	}
 
 	if beforeTS > 0 {
 		q = q.Where("Created < ?", beforeTS)
 	}
 
 	if err := q.QueryAndClose(context.TODO(), db, func(row *sql.Rows) {
-		var created float64
+		var created float64 // use float64 for rqlite compatibility
 		var id string
 		var messageID string
 		var subject string
-		var metadata string
-		var size float64
+		var metadataJSON string
+		var size float64 // use float64 for rqlite compatibility
 		var attachments int
 		var read int
 		var snippet string
 		em := MessageSummary{}
+		var meta Metadata
 
-		if err := row.Scan(&created, &id, &messageID, &subject, &metadata, &size, &attachments, &read, &snippet); err != nil {
+		err := row.Scan(&created, &id, &messageID, &subject, &metadataJSON, &size, &attachments, &read, &snippet)
+		if err != nil {
 			logger.Log().Errorf("[db] %s", err.Error())
 			return
 		}
 
-		if err := json.Unmarshal([]byte(metadata), &em); err != nil {
+		if err := json.Unmarshal([]byte(metadataJSON), &meta); err != nil {
 			logger.Log().Errorf("[json] %s", err.Error())
 			return
 		}
 
+		em.From = meta.From
+		em.To = meta.To
+		em.Cc = meta.Cc
+		em.Bcc = meta.Bcc
+		em.ReplyTo = meta.ReplyTo
+		em.Username = meta.Username
+
 		em.Created = time.UnixMilli(int64(created))
 		em.ID = id
 		em.MessageID = messageID
 		em.Subject = subject
-		em.Size = size
+		em.Size = uint64(size)
 		em.Attachments = attachments
 		em.Read = read == 1
 		em.Snippet = snippet
@@ -254,12 +305,20 @@ func GetMessage(id string) (*Message, error) {
 		return nil, err
 	}
 
-	var from *mail.Address
-	fromData := addressToSlice(env, "From")
-	if len(fromData) > 0 {
-		from = fromData[0]
-	} else if env.GetHeader("From") != "" {
-		from = &mail.Address{Name: env.GetHeader("From")}
+	// Load metadata from DB
+	meta, err := GetMetadata(id)
+	if err != nil {
+		meta = Metadata{}
+	}
+
+	from := meta.From
+	if from == nil {
+		fromData := addressToSlice(env, "From")
+		if len(fromData) > 0 {
+			from = fromData[0]
+		} else if env.GetHeader("From") != "" {
+			from = &mail.Address{Name: env.GetHeader("From")}
+		}
 	}
 
 	messageID := strings.Trim(env.GetHeader("Message-ID"), "<>")
@@ -277,7 +336,7 @@ func GetMessage(id string) (*Message, error) {
 			Where(`ID = ?`, id)
 
 		if err := q.QueryAndClose(context.TODO(), db, func(row *sql.Rows) {
-			var created float64
+			var created float64 // use float64 for rqlite compatibility
 
 			if err := row.Scan(&created); err != nil {
 				logger.Log().Errorf("[db] %s", err.Error())
@@ -285,7 +344,6 @@ func GetMessage(id string) (*Message, error) {
 			}
 
 			logger.Log().Debugf("[db] %s does not contain a date header, using received datetime", id)
-
 			date = time.UnixMilli(int64(created))
 		}); err != nil {
 			logger.Log().Errorf("[db] %s", err.Error())
@@ -304,10 +362,10 @@ func GetMessage(id string) (*Message, error) {
 		ReturnPath: returnPath,
 		Subject:    env.GetHeader("Subject"),
 		Tags:       getMessageTags(id),
-		Size:       float64(len(raw)),
+		Size:       uint64(len(raw)),
 		Text:       env.Text,
+		Username:   meta.Username,
 	}
-
 	obj.HTML = env.HTML
 	obj.Inline = []Attachment{}
 	obj.Attachments = []Attachment{}
@@ -345,7 +403,7 @@ func GetMessage(id string) (*Message, error) {
 	}
 
 	// mark message as read
-	if err := MarkRead(id); err != nil {
+	if err := MarkRead([]string{id}); err != nil {
 		return &obj, err
 	}
 
@@ -356,11 +414,12 @@ func GetMessage(id string) (*Message, error) {
 
 // GetMessageRaw returns an []byte of the full message
 func GetMessageRaw(id string) ([]byte, error) {
-	var i string
-	var msg string
+	var i, msg string
+	var compressed int
 	q := sqlf.From(tenant("mailbox_data")).
 		Select(`ID`).To(&i).
 		Select(`Email`).To(&msg).
+		Select(`Compressed`).To(&compressed).
 		Where(`ID = ?`, id)
 	err := q.QueryRowAndClose(context.Background(), db)
 	if err != nil {
@@ -372,7 +431,7 @@ func GetMessageRaw(id string) ([]byte, error) {
 	}
 
 	var data []byte
-	if sqlDriver == "rqlite" {
+	if sqlDriver == "rqlite" && compressed == 1 {
 		data, err = base64.StdEncoding.DecodeString(msg)
 		if err != nil {
 			return nil, fmt.Errorf("error decoding base64 message: %w", err)
@@ -381,14 +440,18 @@ func GetMessageRaw(id string) ([]byte, error) {
 		data = []byte(msg)
 	}
 
-	raw, err := dbDecoder.DecodeAll(data, nil)
-	if err != nil {
-		return nil, fmt.Errorf("error decompressing message: %s", err.Error())
-	}
-
 	dbLastAction = time.Now()
 
-	return raw, err
+	if compressed == 1 {
+		raw, err := dbDecoder.DecodeAll(data, nil)
+		if err != nil {
+			return nil, fmt.Errorf("error decompressing message: %s", err.Error())
+		}
+
+		return raw, err
+	}
+
+	return data, nil
 }
 
 // GetAttachmentPart returns an *enmime.Part (attachment or inline) from a message
@@ -440,7 +503,7 @@ func AttachmentSummary(a *enmime.Part) Attachment {
 	}
 	o.ContentType = a.ContentType
 	o.ContentID = a.ContentID
-	o.Size = float64(len(a.Content))
+	o.Size = uint64(len(a.Content))
 
 	return o
 }
@@ -473,30 +536,28 @@ func LatestID(r *http.Request) (string, error) {
 }
 
 // MarkRead will mark a message as read
-func MarkRead(id string) error {
-	if !IsUnread(id) {
-		return nil
-	}
+func MarkRead(ids []string) error {
+	for _, id := range ids {
+		_, err := sqlf.Update(tenant("mailbox")).
+			Set("Read", 1).
+			Where("ID = ?", id).
+			ExecAndClose(context.Background(), db)
 
-	_, err := sqlf.Update(tenant("mailbox")).
-		Set("Read", 1).
-		Where("ID = ?", id).
-		ExecAndClose(context.Background(), db)
+		if err == nil {
+			logger.Log().Debugf("[db] marked message %s as read", id)
+		}
 
-	if err == nil {
-		logger.Log().Debugf("[db] marked message %s as read", id)
+		d := struct {
+			ID   string
+			Read bool
+		}{ID: id, Read: true}
+
+		websockets.Broadcast("update", d)
 	}
 
 	BroadcastMailboxStats()
 
-	d := struct {
-		ID   string
-		Read bool
-	}{ID: id, Read: true}
-
-	websockets.Broadcast("update", d)
-
-	return err
+	return nil
 }
 
 // MarkAllRead will mark all messages as read
@@ -550,32 +611,30 @@ func MarkAllUnread() error {
 }
 
 // MarkUnread will mark a message as unread
-func MarkUnread(id string) error {
-	if IsUnread(id) {
-		return nil
+func MarkUnread(ids []string) error {
+	for _, id := range ids {
+		_, err := sqlf.Update(tenant("mailbox")).
+			Set("Read", 0).
+			Where("ID = ?", id).
+			ExecAndClose(context.Background(), db)
+
+		if err == nil {
+			logger.Log().Debugf("[db] marked message %s as unread", id)
+		}
+
+		dbLastAction = time.Now()
+
+		d := struct {
+			ID   string
+			Read bool
+		}{ID: id, Read: false}
+
+		websockets.Broadcast("update", d)
 	}
 
-	_, err := sqlf.Update(tenant("mailbox")).
-		Set("Read", 0).
-		Where("ID = ?", id).
-		ExecAndClose(context.Background(), db)
-
-	if err == nil {
-		logger.Log().Debugf("[db] marked message %s as unread", id)
-	}
-
-	dbLastAction = time.Now()
-
 	BroadcastMailboxStats()
 
-	d := struct {
-		ID   string
-		Read bool
-	}{ID: id, Read: false}
-
-	websockets.Broadcast("update", d)
-
-	return err
+	return nil
 }
 
 // DeleteMessages deletes one or more messages in bulk
@@ -596,19 +655,21 @@ func DeleteMessages(ids []string) error {
 	if err != nil {
 		return err
 	}
-	defer rows.Close()
+	defer func() { _ = rows.Close() }()
 
 	toDelete := []string{}
-	var totalSize float64
+	var totalSize uint64
 
 	for rows.Next() {
 		var id string
-		var size float64
+		var size float64 // use float64 for rqlite compatibility
+
 		if err := rows.Scan(&id, &size); err != nil {
 			return err
 		}
+
 		toDelete = append(toDelete, id)
-		totalSize = totalSize + size
+		totalSize = totalSize + uint64(size)
 	}
 
 	if err = rows.Err(); err != nil {
@@ -645,7 +706,7 @@ func DeleteMessages(ids []string) error {
 	}
 
 	dbLastAction = time.Now()
-	addDeletedSize(int64(totalSize))
+	addDeletedSize(totalSize)
 
 	logMessagesDeleted(len(toDelete))
 
@@ -693,7 +754,7 @@ func DeleteAllMessages() error {
 	}
 
 	// roll back if it fails
-	defer tx.Rollback()
+	defer func() { _ = tx.Rollback() }()
 
 	tables := []string{"mailbox", "mailbox_data", "tags", "message_tags"}
 
@@ -727,3 +788,17 @@ func DeleteAllMessages() error {
 
 	return err
 }
+
+// GetMetadata retrieves the metadata for a message by its ID
+func GetMetadata(id string) (Metadata, error) {
+	var metadataJSON string
+	row := db.QueryRow(fmt.Sprintf("SELECT Metadata FROM %s WHERE ID = ?", tenant("mailbox")), id)
+	if err := row.Scan(&metadataJSON); err != nil {
+		return Metadata{}, err
+	}
+	var meta Metadata
+	if err := json.Unmarshal([]byte(metadataJSON), &meta); err != nil {
+		return Metadata{}, err
+	}
+	return meta, nil
+}

internal/storage/messages_test.go

@@ -1,6 +1,7 @@
 package storage
 
 import (
+	"os"
 	"testing"
 	"time"
 
@@ -16,13 +17,13 @@ func TestTextEmailInserts(t *testing.T) {
 	start := time.Now()
 
 	for i := 0; i < testRuns; i++ {
-		if _, err := Store(&testTextEmail); err != nil {
+		if _, err := Store(&testTextEmail, nil); err != nil {
 			t.Log("error ", err)
 			t.Fail()
 		}
 	}
 
-	assertEqual(t, CountTotal(), float64(testRuns), "Incorrect number of text emails stored")
+	assertEqual(t, CountTotal(), uint64(testRuns), "Incorrect number of text emails stored")
 
 	t.Logf("Inserted %d text emails in %s", testRuns, time.Since(start))
 
@@ -32,7 +33,7 @@ func TestTextEmailInserts(t *testing.T) {
 		t.Fail()
 	}
 
-	assertEqual(t, CountTotal(), float64(0), "incorrect number of text emails deleted")
+	assertEqual(t, CountTotal(), uint64(0), "incorrect number of text emails deleted")
 
 	t.Logf("deleted %d text emails in %s", testRuns, time.Since(delStart))
 
@@ -54,13 +55,13 @@ func TestMimeEmailInserts(t *testing.T) {
 		start := time.Now()
 
 		for i := 0; i < testRuns; i++ {
-			if _, err := Store(&testMimeEmail); err != nil {
+			if _, err := Store(&testMimeEmail, nil); err != nil {
 				t.Log("error ", err)
 				t.Fail()
 			}
 		}
 
-		assertEqual(t, CountTotal(), float64(testRuns), "Incorrect number of mime emails stored")
+		assertEqual(t, CountTotal(), uint64(testRuns), "Incorrect number of mime emails stored")
 
 		t.Logf("Inserted %d text emails in %s", testRuns, time.Since(start))
 
@@ -70,7 +71,7 @@ func TestMimeEmailInserts(t *testing.T) {
 			t.Fail()
 		}
 
-		assertEqual(t, CountTotal(), float64(0), "incorrect number of mime emails deleted")
+		assertEqual(t, CountTotal(), uint64(0), "incorrect number of mime emails deleted")
 
 		t.Logf("Deleted %d mime emails in %s", testRuns, time.Since(delStart))
 
@@ -79,56 +80,64 @@ func TestMimeEmailInserts(t *testing.T) {
 }
 
 func TestRetrieveMimeEmail(t *testing.T) {
-	for _, tenantID := range []string{"", "MyServer 3", "host.example.com"} {
-		tenantID = config.DBTenantID(tenantID)
+	compressionLevels := []int{0, 1, 2, 3}
 
-		setup(tenantID)
+	for _, compressionLevel := range compressionLevels {
+		t.Logf("Testing compression level: %d", compressionLevel)
+		for _, tenantID := range []string{"", "MyServer 3", "host.example.com"} {
+			tenantID = config.DBTenantID(tenantID)
+			config.Compression = compressionLevel
+			setup(tenantID)
 
-		if tenantID == "" {
-			t.Log("Testing mime email retrieval")
-		} else {
-			t.Logf("Testing mime email retrieval (tenant %s)", tenantID)
+			if tenantID == "" {
+				t.Log("Testing mime email retrieval")
+			} else {
+				t.Logf("Testing mime email retrieval (tenant %s)", tenantID)
+			}
+
+			id, err := Store(&testMimeEmail, nil)
+			if err != nil {
+				t.Log("error ", err)
+				t.Fail()
+			}
+
+			msg, err := GetMessage(id)
+			if err != nil {
+				t.Log("error ", err)
+				t.Fail()
+			}
+
+			assertEqual(t, msg.From.Name, "Sender Smith", "\"From\" name does not match")
+			assertEqual(t, msg.From.Address, "sender2@example.com", "\"From\" address does not match")
+			assertEqual(t, msg.Subject, "inline + attachment", "subject does not match")
+			assertEqual(t, len(msg.To), 1, "incorrect number of recipients")
+			assertEqual(t, msg.To[0].Name, "Recipient Ross", "\"To\" name does not match")
+			assertEqual(t, msg.To[0].Address, "recipient2@example.com", "\"To\" address does not match")
+			assertEqual(t, len(msg.Attachments), 1, "incorrect number of attachments")
+			assertEqual(t, msg.Attachments[0].FileName, "Sample PDF.pdf", "attachment filename does not match")
+			assertEqual(t, len(msg.Inline), 1, "incorrect number of inline attachments")
+			assertEqual(t, msg.Inline[0].FileName, "inline-image.jpg", "inline attachment filename does not match")
+
+			attachmentData, err := GetAttachmentPart(id, msg.Attachments[0].PartID)
+			if err != nil {
+				t.Log("error ", err)
+				t.Fail()
+			}
+			assertEqual(t, uint64(len(attachmentData.Content)), msg.Attachments[0].Size, "attachment size does not match")
+
+			inlineData, err := GetAttachmentPart(id, msg.Inline[0].PartID)
+			if err != nil {
+				t.Log("error ", err)
+				t.Fail()
+			}
+			assertEqual(t, uint64(len(inlineData.Content)), msg.Inline[0].Size, "inline attachment size does not match")
+
+			Close()
 		}
-
-		id, err := Store(&testMimeEmail)
-		if err != nil {
-			t.Log("error ", err)
-			t.Fail()
-		}
-
-		msg, err := GetMessage(id)
-		if err != nil {
-			t.Log("error ", err)
-			t.Fail()
-		}
-
-		assertEqual(t, msg.From.Name, "Sender Smith", "\"From\" name does not match")
-		assertEqual(t, msg.From.Address, "sender2@example.com", "\"From\" address does not match")
-		assertEqual(t, msg.Subject, "inline + attachment", "subject does not match")
-		assertEqual(t, len(msg.To), 1, "incorrect number of recipients")
-		assertEqual(t, msg.To[0].Name, "Recipient Ross", "\"To\" name does not match")
-		assertEqual(t, msg.To[0].Address, "recipient2@example.com", "\"To\" address does not match")
-		assertEqual(t, len(msg.Attachments), 1, "incorrect number of attachments")
-		assertEqual(t, msg.Attachments[0].FileName, "Sample PDF.pdf", "attachment filename does not match")
-		assertEqual(t, len(msg.Inline), 1, "incorrect number of inline attachments")
-		assertEqual(t, msg.Inline[0].FileName, "inline-image.jpg", "inline attachment filename does not match")
-
-		attachmentData, err := GetAttachmentPart(id, msg.Attachments[0].PartID)
-		if err != nil {
-			t.Log("error ", err)
-			t.Fail()
-		}
-		assertEqual(t, float64(len(attachmentData.Content)), msg.Attachments[0].Size, "attachment size does not match")
-
-		inlineData, err := GetAttachmentPart(id, msg.Inline[0].PartID)
-		if err != nil {
-			t.Log("error ", err)
-			t.Fail()
-		}
-		assertEqual(t, float64(len(inlineData.Content)), msg.Inline[0].Size, "inline attachment size does not match")
-
-		Close()
 	}
+
+	// reset compression
+	config.Compression = 1
 }
 
 func TestMessageSummary(t *testing.T) {
@@ -143,7 +152,7 @@ func TestMessageSummary(t *testing.T) {
 			t.Logf("Testing message summary (tenant %s)", tenantID)
 		}
 
-		if _, err := Store(&testMimeEmail); err != nil {
+		if _, err := Store(&testMimeEmail, nil); err != nil {
 			t.Log("error ", err)
 			t.Fail()
 		}
@@ -177,7 +186,7 @@ func BenchmarkImportText(b *testing.B) {
 	defer Close()
 
 	for i := 0; i < b.N; i++ {
-		if _, err := Store(&testTextEmail); err != nil {
+		if _, err := Store(&testTextEmail, nil); err != nil {
 			b.Log("error ", err)
 			b.Fail()
 		}
@@ -189,10 +198,101 @@ func BenchmarkImportMime(b *testing.B) {
 	defer Close()
 
 	for i := 0; i < b.N; i++ {
-		if _, err := Store(&testMimeEmail); err != nil {
+		if _, err := Store(&testMimeEmail, nil); err != nil {
 			b.Log("error ", err)
 			b.Fail()
 		}
 	}
 
 }
+
+func TestInlineImageContentIdHandling(t *testing.T) {
+	setup("")
+	defer Close()
+	t.Log("Testing inline content handling")
+	// Test case: Proper inline image with Content-Disposition: inline
+	inlineAttachment, err := os.ReadFile("testdata/inline-attachment.eml")
+	if err != nil {
+		t.Fatalf("Failed to read test email: %v", err)
+	}
+	storedMessage, err := Store(&inlineAttachment, nil)
+	if err != nil {
+		t.Fatal("Failed to store test case 1:", err)
+	}
+
+	msg, err := GetMessage(storedMessage)
+	if err != nil {
+		t.Fatal("Failed to retrieve test case 1:", err)
+	}
+	// Assert
+	if len(msg.Inline) != 1 {
+		t.Errorf("Test case 1: Expected 1 inline attachment, got %d", len(msg.Inline))
+	}
+	if len(msg.Attachments) != 0 {
+		t.Errorf("Test case 1: Expected 0 regular attachments, got %d", len(msg.Attachments))
+	}
+	if msg.Inline[0].ContentID != "test1@example.com" {
+		t.Errorf("Test case 1: Expected ContentID 'test1@example.com', got '%s'", msg.Inline[0].ContentID)
+	}
+}
+
+func TestRegularAttachmentHandling(t *testing.T) {
+	setup("")
+	defer Close()
+	t.Log("Testing regular attachment handling")
+	// Test case: Regular attachment without Content-ID
+	regularAttachment, err := os.ReadFile("testdata/regular-attachment.eml")
+	if err != nil {
+		t.Fatalf("Failed to read test email: %v", err)
+	}
+	storedMessage, err := Store(&regularAttachment, nil)
+	if err != nil {
+		t.Fatal("Failed to store test case 3:", err)
+	}
+	msg, err := GetMessage(storedMessage)
+	if err != nil {
+		t.Fatal("Failed to retrieve test case 3:", err)
+	}
+	// Assert
+	if len(msg.Inline) != 0 {
+		t.Errorf("Test case 3: Expected 0 inline attachments, got %d", len(msg.Inline))
+	}
+	if len(msg.Attachments) != 1 {
+		t.Errorf("Test case 3: Expected 1 regular attachment, got %d", len(msg.Attachments))
+	}
+	if msg.Attachments[0].ContentID != "" {
+		t.Errorf("Test case 3: Expected empty ContentID, got '%s'", msg.Attachments[0].ContentID)
+	}
+}
+
+func TestMixedAttachmentHandling(t *testing.T) {
+	setup("")
+	defer Close()
+	t.Log("Testing mixed attachment handling")
+	// Mixed scenario with both inline and regular attachment
+	mixedAttachment, err := os.ReadFile("testdata/mixed-attachment.eml")
+	if err != nil {
+		t.Fatalf("Failed to read test email: %v", err)
+	}
+	storedMessage, err := Store(&mixedAttachment, nil)
+	if err != nil {
+		t.Fatal("Failed to store test case 4:", err)
+	}
+	msg, err := GetMessage(storedMessage)
+	if err != nil {
+		t.Fatal("Failed to retrieve test case 4:", err)
+	}
+	// Assert: Should have 1 inline (with ContentID) and 1 attachment (without ContentID)
+	if len(msg.Inline) != 1 {
+		t.Errorf("Test case 4: Expected 1 inline attachment, got %d", len(msg.Inline))
+	}
+	if len(msg.Attachments) != 1 {
+		t.Errorf("Test case 4: Expected 1 regular attachment, got %d", len(msg.Attachments))
+	}
+	if msg.Inline[0].ContentID != "inline@example.com" {
+		t.Errorf("Test case 4: Expected inline ContentID 'inline@example.com', got '%s'", msg.Inline[0].ContentID)
+	}
+	if msg.Attachments[0].ContentID != "" {
+		t.Errorf("Test case 4: Expected attachment ContentID to be empty, got '%s'", msg.Attachments[0].ContentID)
+	}
+}

internal/storage/notifications.go

@@ -24,8 +24,8 @@ func BroadcastMailboxStats() {
 		time.Sleep(250 * time.Millisecond)
 		bcStatsDelay = false
 		b := struct {
-			Total   float64
-			Unread  float64
+			Total   uint64
+			Unread  uint64
 			Version string
 		}{
 			Total:   CountTotal(),

internal/storage/reindex.go

@@ -11,7 +11,7 @@ import (
 
 	"github.com/axllent/mailpit/internal/logger"
 	"github.com/axllent/mailpit/internal/tools"
-	"github.com/jhillyerd/enmime"
+	"github.com/jhillyerd/enmime/v2"
 	"github.com/leporo/sqlf"
 )
 
@@ -73,23 +73,22 @@ func ReindexAll() {
 				continue
 			}
 
-			from := &mail.Address{}
+			meta, _ := GetMetadata(id)
+
 			fromJSON := addressToSlice(env, "From")
 			if len(fromJSON) > 0 {
-				from = fromJSON[0]
+				meta.From = fromJSON[0]
 			} else if env.GetHeader("From") != "" {
-				from = &mail.Address{Name: env.GetHeader("From")}
+				meta.From = &mail.Address{Name: env.GetHeader("From")}
+			} else {
+				meta.From = nil
 			}
+			meta.To = addressToSlice(env, "To")
+			meta.Cc = addressToSlice(env, "Cc")
+			meta.Bcc = addressToSlice(env, "Bcc")
+			meta.ReplyTo = addressToSlice(env, "Reply-To")
 
-			obj := DBMailSummary{
-				From:    from,
-				To:      addressToSlice(env, "To"),
-				Cc:      addressToSlice(env, "Cc"),
-				Bcc:     addressToSlice(env, "Bcc"),
-				ReplyTo: addressToSlice(env, "Reply-To"),
-			}
-
-			MetadataJSON, err := json.Marshal(obj)
+			MetadataJSON, err := json.Marshal(meta)
 			if err != nil {
 				logger.Log().Errorf("[message] %s", err.Error())
 				continue
@@ -115,7 +114,7 @@ func ReindexAll() {
 		}
 
 		// roll back if it fails
-		defer tx.Rollback()
+		defer func() { _ = tx.Rollback() }()
 
 		// insert mail summary data
 		for _, u := range updates {

internal/storage/schemas/1.23.0.sql

@@ -0,0 +1,5 @@
+-- CREATE Compressed COLUMN IN mailbox_data
+ALTER TABLE {{ tenant "mailbox_data" }} ADD COLUMN Compressed INTEGER NOT NULL DEFAULT '0';
+
+-- SET Compressed = 1 for all existing data
+UPDATE {{ tenant "mailbox_data" }} SET Compressed = 1;

internal/storage/search.go

@@ -39,12 +39,12 @@ func Search(search, timezone string, start int, beforeTS int64, limit int) ([]Me
 	var err error
 
 	if err := q.QueryAndClose(context.TODO(), db, func(row *sql.Rows) {
-		var created float64
+		var created float64 // use float64 for rqlite compatibility
 		var id string
 		var messageID string
 		var subject string
 		var metadata string
-		var size float64
+		var size float64 // use float64 for rqlite compatibility
 		var attachments int
 		var snippet string
 		var read int
@@ -65,7 +65,7 @@ func Search(search, timezone string, start int, beforeTS int64, limit int) ([]Me
 		em.ID = id
 		em.MessageID = messageID
 		em.Subject = subject
-		em.Size = size
+		em.Size = uint64(size)
 		em.Attachments = attachments
 		em.Read = read == 1
 		em.Snippet = snippet
@@ -100,6 +100,39 @@ func Search(search, timezone string, start int, beforeTS int64, limit int) ([]Me
 	return results, nrResults, err
 }
 
+// SearchUnreadCount returns the number of unread messages matching a search.
+// This is run one at a time to allow connected browsers to be updated.
+func SearchUnreadCount(search, timezone string, beforeTS int64) (int64, error) {
+	tsStart := time.Now()
+
+	q := searchQueryBuilder(search, timezone)
+
+	if beforeTS > 0 {
+		q = q.Where(`Created < ?`, beforeTS)
+	}
+
+	var unread float64 // use float64 for rqlite compatibility
+
+	q = q.Where("Read = 0").Select(`COUNT(*)`)
+
+	err := q.QueryAndClose(context.TODO(), db, func(row *sql.Rows) {
+		var ignore sql.NullString
+		if err := row.Scan(&ignore, &ignore, &ignore, &ignore, &ignore, &ignore, &ignore, &ignore, &ignore, &ignore, &ignore, &ignore, &ignore, &ignore, &unread); err != nil {
+			logger.Log().Errorf("[db] %s", err.Error())
+			return
+		}
+
+	})
+
+	dbLastAction = time.Now()
+
+	elapsed := time.Since(tsStart)
+
+	logger.Log().Debugf("[db] counted %d unread for \"%s\" in %s", int64(unread), search, elapsed)
+
+	return int64(unread), err
+}
+
 // DeleteSearch will delete all messages for search terms.
 // The search is broken up by segments (exact phrases can be quoted), and interprets specific terms such as:
 // is:read, is:unread, has:attachment, to:<term>, from:<term> & subject:<term>
@@ -108,15 +141,15 @@ func DeleteSearch(search, timezone string) error {
 	q := searchQueryBuilder(search, timezone)
 
 	ids := []string{}
-	deleteSize := float64(0)
+	deleteSize := uint64(0)
 
 	if err := q.QueryAndClose(context.TODO(), db, func(row *sql.Rows) {
-		var created float64
+		var created float64 // use float64 for rqlite compatibility
 		var id string
 		var messageID string
 		var subject string
 		var metadata string
-		var size float64
+		var size float64 // use float64 for rqlite compatibility
 		var attachments int
 		var read int
 		var snippet string
@@ -128,7 +161,7 @@ func DeleteSearch(search, timezone string) error {
 		}
 
 		ids = append(ids, id)
-		deleteSize = deleteSize + size
+		deleteSize = deleteSize + uint64(size)
 	}); err != nil {
 		return err
 	}
@@ -160,7 +193,7 @@ func DeleteSearch(search, timezone string) error {
 		}
 
 		// roll back if it fails
-		defer tx.Rollback()
+		defer func() { _ = tx.Rollback() }()
 
 		for _, ids := range chunks {
 			delIDs := make([]interface{}, len(ids))
@@ -214,7 +247,7 @@ func DeleteSearch(search, timezone string) error {
 			}
 		}
 
-		addDeletedSize(int64(deleteSize))
+		addDeletedSize(deleteSize)
 
 		logMessagesDeleted(total)
 
@@ -224,6 +257,47 @@ func DeleteSearch(search, timezone string) error {
 	return nil
 }
 
+// SetSearchReadStatus marks all messages matching the search as read or unread
+func SetSearchReadStatus(search, timezone string, read bool) error {
+	q := searchQueryBuilder(search, timezone).Where("Read = ?", !read)
+
+	ids := []string{}
+
+	if err := q.QueryAndClose(context.TODO(), db, func(row *sql.Rows) {
+		var created float64 // use float64 for rqlite compatibility
+		var id string
+		var messageID string
+		var subject string
+		var metadata string
+		var size float64 // use float64 for rqlite compatibility
+		var attachments int
+		var read int
+		var snippet string
+		var ignore string
+
+		if err := row.Scan(&created, &id, &messageID, &subject, &metadata, &size, &attachments, &read, &snippet, &ignore, &ignore, &ignore, &ignore, &ignore); err != nil {
+			logger.Log().Errorf("[db] %s", err.Error())
+			return
+		}
+
+		ids = append(ids, id)
+	}); err != nil {
+		return err
+	}
+
+	if read {
+		if err := MarkRead(ids); err != nil {
+			return err
+		}
+	} else {
+		if err := MarkUnread(ids); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
 // SearchParser returns the SQL syntax for the database search based on the search arguments
 func searchQueryBuilder(searchString, timezone string) *sqlf.Stmt {
 	// group strings with quotes as a single argument and remove quotes
@@ -265,8 +339,8 @@ func searchQueryBuilder(searchString, timezone string) *sqlf.Stmt {
 			lw = lw[1:]
 		}
 
-		re := regexp.MustCompile(`[a-zA-Z0-9]+`)
-		if !re.MatchString(w) {
+		// ignore blank searches
+		if len(w) == 0 {
 			continue
 		}
 
@@ -445,7 +519,7 @@ func searchQueryBuilder(searchString, timezone string) *sqlf.Stmt {
 //
 // K, k, Kb, KB, kB and kb are treated as Kilobytes.
 // M, m, Mb, MB and mb are treated as Megabytes.
-func sizeToBytes(v string) int64 {
+func sizeToBytes(v string) uint64 {
 	v = strings.ToLower(v)
 	re := regexp.MustCompile(`^(\d+)(\.\d+)?\s?([a-z]{1,2})?$`)
 
@@ -463,15 +537,15 @@ func sizeToBytes(v string) int64 {
 	}
 
 	if unit == "" {
-		return int64(i)
+		return uint64(i)
 	}
 
 	if unit == "k" || unit == "kb" {
-		return int64(i * 1024)
+		return uint64(i * 1024)
 	}
 
 	if unit == "m" || unit == "mb" {
-		return int64(i * 1024 * 1024)
+		return uint64(i * 1024 * 1024)
 	}
 
 	return 0

internal/storage/search_test.go

@@ -7,7 +7,7 @@ import (
 	"testing"
 
 	"github.com/axllent/mailpit/config"
-	"github.com/jhillyerd/enmime"
+	"github.com/jhillyerd/enmime/v2"
 )
 
 func TestSearch(t *testing.T) {
@@ -48,7 +48,7 @@ func TestSearch(t *testing.T) {
 
 			bufBytes := buf.Bytes()
 
-			if _, err := Store(&bufBytes); err != nil {
+			if _, err := Store(&bufBytes, nil); err != nil {
 				t.Log("error ", err)
 				t.Fail()
 			}
@@ -117,11 +117,11 @@ func TestSearchDelete100(t *testing.T) {
 		}
 
 		for i := 0; i < 100; i++ {
-			if _, err := Store(&testTextEmail); err != nil {
+			if _, err := Store(&testTextEmail, nil); err != nil {
 				t.Log("error ", err)
 				t.Fail()
 			}
-			if _, err := Store(&testMimeEmail); err != nil {
+			if _, err := Store(&testMimeEmail, nil); err != nil {
 				t.Log("error ", err)
 				t.Fail()
 			}
@@ -158,7 +158,7 @@ func TestSearchDelete1100(t *testing.T) {
 
 	t.Log("Testing search delete of 1100 messages")
 	for i := 0; i < 1100; i++ {
-		if _, err := Store(&testTextEmail); err != nil {
+		if _, err := Store(&testTextEmail, nil); err != nil {
 			t.Log("error ", err)
 			t.Fail()
 		}
@@ -203,7 +203,7 @@ func TestEscPercentChar(t *testing.T) {
 }
 
 func TestSizeToBytes(t *testing.T) {
-	tests := map[string]int64{}
+	tests := map[string]uint64{}
 	tests["1m"] = 1048576
 	tests["1mb"] = 1048576
 	tests["1 M"] = 1048576

internal/storage/settings.go

@@ -35,8 +35,8 @@ func SettingPut(k, v string) error {
 }
 
 // The total deleted message size as an int64 value
-func getDeletedSize() float64 {
-	var result sql.NullFloat64
+func getDeletedSize() uint64 {
+	var result sql.NullFloat64 // use float64 for rqlite compatibility
 	err := sqlf.From(tenant("settings")).
 		Select("Value").To(&result).
 		Where("Key = ?", "DeletedSize").
@@ -47,11 +47,11 @@ func getDeletedSize() float64 {
 		return 0
 	}
 
-	return result.Float64
+	return uint64(result.Float64)
 }
 
 // The total raw non-compressed messages size in bytes of all messages in the database
-func totalMessagesSize() float64 {
+func totalMessagesSize() uint64 {
 	var result sql.NullFloat64
 	err := sqlf.From(tenant("mailbox")).
 		Select("SUM(Size)").To(&result).
@@ -61,11 +61,11 @@ func totalMessagesSize() float64 {
 		return 0
 	}
 
-	return result.Float64
+	return uint64(result.Float64)
 }
 
 // AddDeletedSize will add the value to the DeletedSize setting
-func addDeletedSize(v int64) {
+func addDeletedSize(v uint64) {
 	if _, err := db.Exec(`INSERT OR IGNORE INTO `+tenant("settings")+` (Key, Value) VALUES(?, ?)`, "DeletedSize", 0); err != nil {
 		logger.Log().Errorf("[db] %s", err.Error())
 	}

internal/storage/structs.go

@@ -28,18 +28,20 @@ type Message struct {
 	// Message subject
 	Subject string
 	// List-Unsubscribe header information
-	// swagger:ignore
 	ListUnsubscribe ListUnsubscribe
-	// Message date if set, else date received
+	// Message RFC3339Nano date & time (if set), else date & time received
+	// ([extended RFC3339](https://tools.ietf.org/html/rfc3339#section-5.6) format with optional nano seconds)
 	Date time.Time
 	// Message tags
 	Tags []string
+	// Username used for authentication (if provided) with the SMTP or Send API
+	Username string
 	// Message body text
 	Text string
 	// Message body HTML
 	HTML string
 	// Message size in bytes
-	Size float64
+	Size uint64
 	// Inline message attachments
 	Inline []Attachment
 	// Message attachments
@@ -59,7 +61,7 @@ type Attachment struct {
 	// Content ID
 	ContentID string
 	// Size in bytes
-	Size float64
+	Size uint64
 }
 
 // MessageSummary struct for frontend messages
@@ -84,12 +86,14 @@ type MessageSummary struct {
 	ReplyTo []*mail.Address
 	// Email subject
 	Subject string
-	// Created time
+	// Received RFC3339Nano date & time ([extended RFC3339](https://tools.ietf.org/html/rfc3339#section-5.6) format with optional nano seconds)
 	Created time.Time
+	// Username used for authentication (if provided) with the SMTP or Send API
+	Username string
 	// Message tags
 	Tags []string
 	// Message size in bytes (total)
-	Size float64
+	Size uint64
 	// Whether the message has any attachments
 	Attachments int
 	// Message snippet includes up to 250 characters
@@ -98,18 +102,19 @@ type MessageSummary struct {
 
 // MailboxStats struct for quick mailbox total/read lookups
 type MailboxStats struct {
-	Total  float64
-	Unread float64
+	Total  uint64
+	Unread uint64
 	Tags   []string
 }
 
-// DBMailSummary struct for storing mail summary
-type DBMailSummary struct {
-	From    *mail.Address
-	To      []*mail.Address
-	Cc      []*mail.Address
-	Bcc     []*mail.Address
-	ReplyTo []*mail.Address
+// Metadata struct for storing message metadata
+type Metadata struct {
+	From     *mail.Address   `json:"From,omitempty"`
+	To       []*mail.Address `json:"To,omitempty"`
+	Cc       []*mail.Address `json:"Cc,omitempty"`
+	Bcc      []*mail.Address `json:"Bcc,omitempty"`
+	ReplyTo  []*mail.Address `json:"ReplyTo,omitempty"`
+	Username string          `json:"Username,omitempty"`
 }
 
 // ListUnsubscribe contains a summary of List-Unsubscribe & List-Unsubscribe-Post headers
@@ -117,10 +122,10 @@ type DBMailSummary struct {
 type ListUnsubscribe struct {
 	// List-Unsubscribe header value
 	Header string
-	// Detected links, maximum one email and one HTTP(S)
+	// Detected links, maximum one email and one HTTP(S) link
 	Links []string
-	// Validation errors if any
+	// Validation errors (if any)
 	Errors string
-	// List-Unsubscribe-Post value if set
+	// List-Unsubscribe-Post value (if set)
 	HeaderPost string
 }

internal/storage/tagfilters.go

@@ -33,7 +33,7 @@ func LoadTagFilters() {
 			logger.Log().Warnf("[tags] ignoring tag item with missing 'match'")
 			continue
 		}
-		if t.Tags == nil || len(t.Tags) == 0 {
+		if len(t.Tags) == 0 {
 			logger.Log().Warnf("[tags] ignoring tag items with missing 'tags' array")
 			continue
 		}

internal/storage/tags.go

@@ -138,17 +138,6 @@ func deleteMessageTag(id, name string) error {
 	return pruneUnusedTags()
 }
 
-// DeleteAllMessageTags deleted all tags from a message
-func DeleteAllMessageTags(id string) error {
-	if _, err := sqlf.DeleteFrom(tenant("message_tags")).
-		Where(tenant("message_tags.ID")+" = ?", id).
-		ExecAndClose(context.TODO(), db); err != nil {
-		return err
-	}
-
-	return pruneUnusedTags()
-}
-
 // GetAllTags returns all used tags
 func GetAllTags() []string {
 	var tags = []string{}
@@ -171,7 +160,7 @@ func GetAllTags() []string {
 func GetAllTagsCount() map[string]int64 {
 	var tags = make(map[string]int64)
 	var name string
-	var total int64
+	var total float64 // use float64 for rqlite compatibility
 
 	if err := sqlf.
 		Select(`Name`).To(&name).
@@ -181,7 +170,7 @@ func GetAllTagsCount() map[string]int64 {
 		GroupBy(tenant("message_tags.TagID")).
 		OrderBy("Name").
 		QueryAndClose(context.TODO(), db, func(row *sql.Rows) {
-			tags[name] = total
+			tags[name] = int64(total)
 		}); err != nil {
 		logger.Log().Errorf("[db] %s", err.Error())
 	}
@@ -323,7 +312,7 @@ func findTagsInRawMessage(message *[]byte) []string {
 }
 
 // Returns tags found in email plus addresses (eg: test+tagname@example.com)
-func (d DBMailSummary) tagsFromPlusAddresses() []string {
+func (d Metadata) tagsFromPlusAddresses() []string {
 	tags := []string{}
 	for _, c := range d.To {
 		matches := addressPlusRe.FindAllStringSubmatch(c.Address, 1)

internal/storage/tags_test.go

@@ -1,11 +1,13 @@
 package storage
 
 import (
+	"context"
 	"fmt"
 	"strings"
 	"testing"
 
 	"github.com/axllent/mailpit/config"
+	"github.com/leporo/sqlf"
 )
 
 func TestTags(t *testing.T) {
@@ -24,7 +26,7 @@ func TestTags(t *testing.T) {
 		ids := []string{}
 
 		for i := 0; i < 10; i++ {
-			id, err := Store(&testMimeEmail)
+			id, err := Store(&testMimeEmail, nil)
 			if err != nil {
 				t.Log("error ", err)
 				t.Fail()
@@ -57,7 +59,7 @@ func TestTags(t *testing.T) {
 		}
 
 		// test 20 tags
-		id, err := Store(&testMimeEmail)
+		id, err := Store(&testMimeEmail, nil)
 		if err != nil {
 			t.Log("error ", err)
 			t.Fail()
@@ -83,7 +85,7 @@ func TestTags(t *testing.T) {
 		assertEqual(t, strings.Join(newTags[1:], "|"), strings.Join(returnedTags, "|"), "Message tags do not match after deleting 1")
 
 		// remove all tags
-		if err := DeleteAllMessageTags(id); err != nil {
+		if err := deleteAllMessageTags(id); err != nil {
 			t.Log("error ", err)
 			t.Fail()
 		}
@@ -97,7 +99,7 @@ func TestTags(t *testing.T) {
 		}
 		returnedTags = getMessageTags(id)
 		assertEqual(t, "Duplicate Tag", strings.Join(returnedTags, "|"), "Message tags should be duplicated")
-		if err := DeleteAllMessageTags(id); err != nil {
+		if err := deleteAllMessageTags(id); err != nil {
 			t.Log("error ", err)
 			t.Fail()
 		}
@@ -109,7 +111,7 @@ func TestTags(t *testing.T) {
 		}
 		returnedTags = getMessageTags(id)
 		assertEqual(t, "Dirty Tag", strings.Join(returnedTags, "|"), "Dirty message tag did not clean as expected")
-		if err := DeleteAllMessageTags(id); err != nil {
+		if err := deleteAllMessageTags(id); err != nil {
 			t.Log("error ", err)
 			t.Fail()
 		}
@@ -124,7 +126,7 @@ func TestTags(t *testing.T) {
 		}
 
 		// test 20 tags
-		id, err = Store(&testTagEmail)
+		id, err = Store(&testTagEmail, nil)
 		if err != nil {
 			t.Log("error ", err)
 			t.Fail()
@@ -132,7 +134,7 @@ func TestTags(t *testing.T) {
 
 		returnedTags = getMessageTags(id)
 		assertEqual(t, "BccTag|CcTag|FromFag|ToTag|X-tag1|X-tag2", strings.Join(returnedTags, "|"), "Tags not detected correctly")
-		if err := DeleteAllMessageTags(id); err != nil {
+		if err := deleteAllMessageTags(id); err != nil {
 			t.Log("error ", err)
 			t.Fail()
 		}
@@ -141,3 +143,59 @@ func TestTags(t *testing.T) {
 	}
 
 }
+func TestUsernameAutoTagging(t *testing.T) {
+	setup("")
+	defer Close()
+
+	username := "testuser"
+
+	t.Run("Auto-tagging enabled", func(t *testing.T) {
+		config.TagsUsername = true
+		id, err := Store(&testTextEmail, &username)
+		if err != nil {
+			t.Fatalf("Store failed: %v", err)
+		}
+		msg, err := GetMessage(id)
+		if err != nil {
+			t.Fatalf("GetMessage failed: %v", err)
+		}
+		found := false
+		for _, tag := range msg.Tags {
+			if tag == username {
+				found = true
+				break
+			}
+		}
+		if !found {
+			t.Errorf("Expected username '%s' in tags, got %v", username, msg.Tags)
+		}
+	})
+
+	t.Run("Auto-tagging disabled", func(t *testing.T) {
+		config.TagsUsername = false
+		id, err := Store(&testTextEmail, &username)
+		if err != nil {
+			t.Fatalf("Store failed: %v", err)
+		}
+		msg, err := GetMessage(id)
+		if err != nil {
+			t.Fatalf("GetMessage failed: %v", err)
+		}
+		for _, tag := range msg.Tags {
+			if tag == username {
+				t.Errorf("Did not expect username '%s' in tags when disabled, got %v", username, msg.Tags)
+			}
+		}
+	})
+}
+
+// DeleteAllMessageTags deleted all tags from a message
+func deleteAllMessageTags(id string) error {
+	if _, err := sqlf.DeleteFrom(tenant("message_tags")).
+		Where(tenant("message_tags.ID")+" = ?", id).
+		ExecAndClose(context.TODO(), db); err != nil {
+		return err
+	}
+
+	return pruneUnusedTags()
+}

internal/storage/testdata/inline-attachment.eml

@@ -0,0 +1,20 @@
+From: sender@example.com
+To: recipient@example.com
+Subject: Test inline image proper
+MIME-Version: 1.0
+Content-Type: multipart/related; boundary="boundary123"
+
+--boundary123
+Content-Type: text/html; charset=utf-8
+
+<html><body><img src="cid:test1@example.com" alt="Test"/></body></html>
+
+--boundary123
+Content-Type: image/png; name="test1.png"
+Content-Disposition: inline; filename="test1.png"
+Content-ID: <test1@example.com>
+Content-Transfer-Encoding: base64
+
+iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mP8/5+hHgAHggJ/PchI7wAAAABJRU5ErkJggg==
+
+--boundary123--

internal/storage/testdata/mixed-attachment.eml

@@ -0,0 +1,27 @@
+From: sender@example.com
+To: recipient@example.com
+Subject: Test mixed attachments
+MIME-Version: 1.0
+Content-Type: multipart/mixed; boundary="boundary111"
+
+--boundary111
+Content-Type: text/html; charset=utf-8
+
+<html><body><img src="cid:inline@example.com" alt="Inline"/><p>Document attached</p></body></html>
+
+--boundary111
+Content-Type: image/png; name="inline.png"
+Content-Disposition: inline; filename="inline.png"
+Content-ID: <inline@example.com>
+Content-Transfer-Encoding: base64
+
+iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mP8/5+hHgAHggJ/PchI7wAAAABJRU5ErkJggg==
+
+--boundary111
+Content-Type: application/pdf; name="document.pdf"
+Content-Disposition: attachment; filename="document.pdf"
+Content-Transfer-Encoding: base64
+
+JVBERi0xLjQKJcOkw7zDtsOfCjIgMCBvYmoKPDwvTGVuZ3RoIDMgMCBSL0ZpbHRlci9GbGF0ZURlY29kZT4+CnN0cmVhbQo=
+
+--boundary111--

internal/storage/testdata/regular-attachment.eml

@@ -0,0 +1,19 @@
+From: sender@example.com
+To: recipient@example.com
+Subject: Test regular attachment
+MIME-Version: 1.0
+Content-Type: multipart/mixed; boundary="boundary789"
+
+--boundary789
+Content-Type: text/html; charset=utf-8
+
+<html><body><p>Message with regular attachment</p></body></html>
+
+--boundary789
+Content-Type: application/pdf; name="document.pdf"
+Content-Disposition: attachment; filename="document.pdf"
+Content-Transfer-Encoding: base64
+
+JVBERi0xLjQKJcOkw7zDtsOfCjIgMCBvYmoKPDwvTGVuZ3RoIDMgMCBSL0ZpbHRlci9GbGF0ZURlY29kZT4+CnN0cmVhbQo=
+
+--boundary789--

internal/storage/utils.go

@@ -9,14 +9,15 @@ import (
 
 	"github.com/axllent/mailpit/internal/html2text"
 	"github.com/axllent/mailpit/internal/logger"
-	"github.com/jhillyerd/enmime"
+	"github.com/axllent/mailpit/internal/tools"
+	"github.com/jhillyerd/enmime/v2"
 )
 
 var (
 	// for stats to prevent import cycle
 	mu sync.RWMutex
 	// StatsDeleted for counting the number of messages deleted
-	StatsDeleted float64
+	StatsDeleted uint64
 )
 
 // AddTempFile adds a file to the slice of files to delete on exit
@@ -88,7 +89,7 @@ func cleanString(str string) string {
 // LogMessagesDeleted logs the number of messages deleted
 func logMessagesDeleted(n int) {
 	mu.Lock()
-	StatsDeleted = StatsDeleted + float64(n)
+	StatsDeleted = StatsDeleted + tools.SafeUint64(n)
 	mu.Unlock()
 }
 

internal/tools/fs.go

@@ -0,0 +1,23 @@
+package tools
+
+import (
+	"os"
+	"path/filepath"
+)
+
+// IsFile returns whether a file exists and is readable
+func IsFile(path string) bool {
+	f, err := os.Open(filepath.Clean(path))
+	defer func() { _ = f.Close() }()
+	return err == nil
+}
+
+// IsDir returns whether a path is a directory
+func IsDir(path string) bool {
+	info, err := os.Stat(path)
+	if err != nil || os.IsNotExist(err) || !info.IsDir() {
+		return false
+	}
+
+	return true
+}

internal/tools/headers.go

@@ -58,8 +58,10 @@ func RemoveMessageHeaders(msg []byte, headers []string) ([]byte, error) {
 	return msg, nil
 }
 
-// UpdateMessageHeader scans a message for a header and updates its value if found.
-func UpdateMessageHeader(msg []byte, header, value string) ([]byte, error) {
+// SetMessageHeader scans a message for a header and updates its value if found.
+// It does not consider multiple instances of the same header.
+// If not found it will add the header to the beginning of the message.
+func SetMessageHeader(msg []byte, header, value string) ([]byte, error) {
 	reader := bytes.NewReader(msg)
 	m, err := mail.ReadMessage(reader)
 	if err != nil {
@@ -90,13 +92,11 @@ func UpdateMessageHeader(msg []byte, header, value string) ([]byte, error) {
 			}
 		}
 
-		if len(hdr) > 0 {
-			logger.Log().Debugf("[relay] replaced %s header", hdr)
-			msg = bytes.Replace(msg, hdr, []byte(header+": "+value+"\r\n"), 1)
-		}
+		return bytes.Replace(msg, hdr, []byte(header+": "+value+"\r\n"), 1), nil
 	}
 
-	return msg, nil
+	// no header, so add one to beginning
+	return append([]byte(header+": "+value+"\r\n"), msg...), nil
 }
 
 // OverrideFromHeader scans a message for the From header and replaces it with a different email address.

internal/tools/listunsubscribeparser.go

@@ -27,7 +27,7 @@ func ListUnsubscribeParser(v string) ([]string, error) {
 	comments := reComments.FindAllStringSubmatch(v, -1)
 	for _, c := range comments {
 		// strip comments
-		v = strings.Replace(v, c[0], "", -1)
+		v = strings.ReplaceAll(v, c[0], "")
 		v = strings.TrimSpace(v)
 	}
 

internal/tools/tags.go

@@ -10,7 +10,7 @@ import (
 
 var (
 	// Invalid tag characters regex
-	tagsInvalidChars = regexp.MustCompile(`[^a-zA-Z0-9\-\ \_\.]`)
+	tagsInvalidChars = regexp.MustCompile(`[^a-zA-Z0-9\-\ \_\.@]`)
 
 	// Regex to catch multiple spaces
 	multiSpaceRe = regexp.MustCompile(`(\s+)`)
@@ -19,14 +19,21 @@ var (
 	TagsTitleCase bool
 )
 
-// CleanTag returns a clean tag, trimming whitespace and replacing invalid characters
+// CleanTag returns a clean tag, trimming whitespace and replacing invalid characters.
+// If the tag is longer than 100 characters, it is truncated.
 func CleanTag(s string) string {
-	return strings.TrimSpace(
+	t := strings.TrimSpace(
 		multiSpaceRe.ReplaceAllString(
 			tagsInvalidChars.ReplaceAllString(s, " "),
 			" ",
 		),
 	)
+
+	if len(t) > 100 {
+		return t[:100]
+	}
+
+	return t
 }
 
 // SetTagCasing returns the slice of tags, title-casing if set

internal/tools/tools_test.go

@@ -33,7 +33,8 @@ func TestCleanTag(t *testing.T) {
 	tests["thiS IS a Test :-)"] = "thiS IS a Test -"
 	tests["  thiS 99     IS a Test :-)"] = "thiS 99 IS a Test -"
 	tests["this_is-a test "] = "this_is-a test"
-	tests["this_is-a&^%%(*)@ test"] = "this_is-a test"
+	tests["this_is-a&^%%(*)@ test"] = "this_is-a @ test"
+	tests["this is a long tag title with more than 100 characters, which should get automatically truncated to 100 characters"] = "this is a long tag title with more than 100 characters which should get automatically truncated to 1"
 
 	for search, expected := range tests {
 		res := CleanTag(search)

internal/tools/utils.go

@@ -36,3 +36,22 @@ func Normalize(s string) string {
 
 	return strings.TrimSpace(s)
 }
+
+// SafeUint64 converts an int or int64 to uint64, ensuring it does not exceed the maximum value for uint64.
+func SafeUint64(i any) uint64 {
+	switch v := i.(type) {
+	case int:
+		if v < 0 {
+			return 0
+		}
+		return uint64(v)
+	case int64:
+		if v < 0 {
+			return 0
+		}
+		return uint64(v)
+	default:
+		// only accepts int or int64
+		return 0
+	}
+}

internal/updater/targz.go

@@ -1,218 +0,0 @@
-package updater
-
-import (
-	"archive/tar"
-	"bufio"
-	"compress/gzip"
-	"fmt"
-	"io"
-	"os"
-	"path/filepath"
-	"strings"
-	"syscall"
-)
-
-// TarGZExtract extracts a archive from the file inputFilePath.
-// It tries to create the directory structure outputFilePath contains if it doesn't exist.
-// It returns potential errors to be checked or nil if everything works.
-func TarGZExtract(inputFilePath, outputFilePath string) (err error) {
-	outputFilePath = stripTrailingSlashes(outputFilePath)
-	inputFilePath, outputFilePath, err = makeAbsolute(inputFilePath, outputFilePath)
-	if err != nil {
-		return err
-	}
-	undoDir, err := mkdirAll(outputFilePath, 0750)
-	if err != nil {
-		return err
-	}
-	defer func() {
-		if err != nil {
-			undoDir()
-		}
-	}()
-
-	return extract(inputFilePath, outputFilePath)
-}
-
-// Creates all directories with os.MakedirAll and returns a function to remove the first created directory so cleanup is possible.
-func mkdirAll(dirPath string, perm os.FileMode) (func(), error) {
-	var undoDir string
-
-	for p := dirPath; ; p = filepath.Dir(p) {
-		finfo, err := os.Stat(p)
-		if err == nil {
-			if finfo.IsDir() {
-				break
-			}
-
-			finfo, err = os.Lstat(p)
-			if err != nil {
-				return nil, err
-			}
-
-			if finfo.IsDir() {
-				break
-			}
-
-			return nil, fmt.Errorf("mkdirAll (%s): %v", p, syscall.ENOTDIR)
-		}
-
-		if os.IsNotExist(err) {
-			undoDir = p
-		} else {
-			return nil, err
-		}
-	}
-
-	if undoDir == "" {
-		return func() {}, nil
-	}
-
-	if err := os.MkdirAll(dirPath, perm); err != nil {
-		return nil, err
-	}
-
-	return func() {
-		if err := os.RemoveAll(undoDir); err != nil {
-			panic(err)
-		}
-	}, nil
-}
-
-// Remove trailing slash if any.
-func stripTrailingSlashes(path string) string {
-	if len(path) > 0 && path[len(path)-1] == '/' {
-		path = path[0 : len(path)-1]
-	}
-
-	return path
-}
-
-// Make input and output paths absolute.
-func makeAbsolute(inputFilePath, outputFilePath string) (string, string, error) {
-	inputFilePath, err := filepath.Abs(inputFilePath)
-	if err == nil {
-		outputFilePath, err = filepath.Abs(outputFilePath)
-	}
-
-	return inputFilePath, outputFilePath, err
-}
-
-// Extract the file in filePath to directory.
-func extract(filePath string, directory string) error {
-	file, err := os.Open(filepath.Clean(filePath))
-	if err != nil {
-		return err
-	}
-
-	defer func() {
-		if err := file.Close(); err != nil {
-			fmt.Printf("Error closing file: %s\n", err)
-		}
-	}()
-
-	gzipReader, err := gzip.NewReader(bufio.NewReader(file))
-	if err != nil {
-		return err
-	}
-	defer gzipReader.Close()
-
-	tarReader := tar.NewReader(gzipReader)
-
-	// Post extraction directory permissions & timestamps
-	type DirInfo struct {
-		Path   string
-		Header *tar.Header
-	}
-
-	// slice to add all extracted directory info for post-processing
-	postExtraction := []DirInfo{}
-
-	for {
-		header, err := tarReader.Next()
-		if err == io.EOF {
-			break
-		}
-		if err != nil {
-			return err
-		}
-
-		fileInfo := header.FileInfo()
-		// paths could contain a '..', is used in a file system operations
-		if strings.Contains(fileInfo.Name(), "..") {
-			continue
-		}
-		dir := filepath.Join(directory, filepath.Dir(header.Name))
-		filename := filepath.Join(dir, fileInfo.Name())
-
-		if fileInfo.IsDir() {
-			// create the directory 755 in case writing permissions prohibit writing before files added
-			if err := os.MkdirAll(filename, 0750); err != nil {
-				return err
-			}
-
-			// set file ownership (if allowed)
-			// Chtimes() && Chmod() only set after once extraction is complete
-			_ = os.Chown(filename, header.Uid, header.Gid)
-
-			// add directory info to slice to process afterwards
-			postExtraction = append(postExtraction, DirInfo{filename, header})
-			continue
-		}
-
-		// make sure parent directory exists (may not be included in tar)
-		if !fileInfo.IsDir() && !isDir(dir) {
-			err = os.MkdirAll(dir, 0750)
-			if err != nil {
-				return err
-			}
-		}
-
-		file, err := os.Create(filepath.Clean(filename))
-		if err != nil {
-			return err
-		}
-
-		writer := bufio.NewWriter(file)
-
-		buffer := make([]byte, 4096)
-		for {
-			n, err := tarReader.Read(buffer)
-			if err != nil && err != io.EOF {
-				panic(err)
-			}
-			if n == 0 {
-				break
-			}
-
-			_, err = writer.Write(buffer[:n])
-			if err != nil {
-				return err
-			}
-		}
-
-		err = writer.Flush()
-		if err != nil {
-			return err
-		}
-
-		err = file.Close()
-		if err != nil {
-			return err
-		}
-
-		// set file permissions, timestamps & uid/gid
-		_ = os.Chmod(filename, os.FileMode(header.Mode)) // #nosec
-		_ = os.Chtimes(filename, header.AccessTime, header.ModTime)
-		_ = os.Chown(filename, header.Uid, header.Gid)
-	}
-
-	if len(postExtraction) > 0 {
-		for _, dir := range postExtraction {
-			_ = os.Chtimes(dir.Path, dir.Header.AccessTime, dir.Header.ModTime)
-			_ = os.Chmod(dir.Path, dir.Header.FileInfo().Mode().Perm())
-		}
-	}
-
-	return nil
-}

internal/updater/unzip.go

@@ -1,76 +0,0 @@
-package updater
-
-import (
-	"archive/zip"
-	"fmt"
-	"io"
-	"os"
-	"path/filepath"
-	"strings"
-)
-
-// Unzip will decompress a zip archive, moving all files and folders
-// within the zip file (src) to an output directory (dest).
-func Unzip(src string, dest string) ([]string, error) {
-
-	var filenames []string
-
-	r, err := zip.OpenReader(src)
-	if err != nil {
-		return filenames, err
-	}
-	defer r.Close()
-
-	for _, f := range r.File {
-
-		// Store filename/path for returning and using later on
-		fpath := filepath.Join(dest, filepath.Clean(f.Name))
-
-		// Check for ZipSlip. More Info: http://bit.ly/2MsjAWE
-		if !strings.HasPrefix(fpath, filepath.Clean(dest)+string(os.PathSeparator)) {
-			return filenames, fmt.Errorf("%s: illegal file path", fpath)
-		}
-
-		filenames = append(filenames, fpath)
-
-		if f.FileInfo().IsDir() {
-			// Make Folder
-			if err := os.MkdirAll(fpath, os.ModePerm); /* #nosec */ err != nil {
-				return filenames, err
-			}
-			continue
-		}
-
-		// Make File
-		if err = os.MkdirAll(filepath.Dir(fpath), os.ModePerm); /* #nosec */ err != nil {
-			return filenames, err
-		}
-
-		outFile, err := os.OpenFile(filepath.Clean(fpath), os.O_WRONLY|os.O_CREATE|os.O_TRUNC, f.Mode())
-		if err != nil {
-			return filenames, err
-		}
-
-		rc, err := f.Open()
-		if err != nil {
-			return filenames, err
-		}
-
-		_, err = io.Copy(outFile, rc) // #nosec - file is streamed from zip to file
-
-		// Close the file without defer to close before next iteration of loop
-		if err := outFile.Close(); err != nil {
-			return filenames, err
-		}
-
-		if err := rc.Close(); err != nil {
-			return filenames, err
-		}
-
-		if err != nil {
-			return filenames, err
-		}
-	}
-
-	return filenames, nil
-}

internal/updater/updater.go

@@ -1,347 +0,0 @@
-// package Updater checks and downloads new versions
-package updater
-
-import (
-	"crypto/rand"
-	"encoding/hex"
-	"encoding/json"
-	"fmt"
-	"io"
-	"net/http"
-	"os"
-	"os/exec"
-	"path/filepath"
-	"runtime"
-	"time"
-
-	"github.com/axllent/mailpit/config"
-	"github.com/axllent/mailpit/internal/logger"
-	"github.com/axllent/semver"
-)
-
-var (
-	// AllowPrereleases defines whether pre-releases may be included
-	AllowPrereleases = false
-
-	// temporary directory
-	tempDir string
-)
-
-// Releases struct for Github releases json
-type Releases []struct {
-	Name       string `json:"name"`       // release name
-	Tag        string `json:"tag_name"`   // release tag
-	Prerelease bool   `json:"prerelease"` // Github pre-release
-	Assets     []struct {
-		BrowserDownloadURL string `json:"browser_download_url"`
-		ID                 int64  `json:"id"`
-		Name               string `json:"name"`
-		Size               int64  `json:"size"`
-	} `json:"assets"`
-}
-
-// Release struct contains the file data for downloadable release
-type Release struct {
-	Name string
-	Tag  string
-	URL  string
-	Size int64
-}
-
-// GithubLatest fetches the latest release info & returns release tag, filename & download url
-func GithubLatest(repo, name string) (string, string, string, error) {
-	releaseURL := fmt.Sprintf("https://api.github.com/repos/%s/releases", repo)
-
-	timeout := time.Duration(5 * time.Second)
-
-	client := http.Client{
-		Timeout: timeout,
-	}
-
-	req, err := http.NewRequest("GET", releaseURL, nil)
-	if err != nil {
-		return "", "", "", err
-	}
-
-	req.Header.Set("User-Agent", "Mailpit/"+config.Version)
-
-	resp, err := client.Do(req)
-	if err != nil {
-		return "", "", "", err
-	}
-
-	defer resp.Body.Close()
-
-	body, err := io.ReadAll(resp.Body)
-
-	if err != nil {
-		return "", "", "", err
-	}
-
-	linkOS := runtime.GOOS
-	linkArch := runtime.GOARCH
-	linkExt := ".tar.gz"
-	if linkOS == "windows" {
-		// Windows uses .zip instead
-		linkExt = ".zip"
-	}
-
-	var allReleases = []Release{}
-
-	var releases Releases
-
-	if err := json.Unmarshal(body, &releases); err != nil {
-		return "", "", "", err
-	}
-
-	archiveName := fmt.Sprintf("%s-%s-%s%s", name, linkOS, linkArch, linkExt)
-
-	// loop through releases
-	for _, r := range releases {
-		if !semver.IsValid(r.Tag) {
-			// Invalid semversion, skip
-			continue
-		}
-
-		if !AllowPrereleases && (semver.Prerelease(r.Tag) != "" || r.Prerelease) {
-			// we don't accept AllowPrereleases, skip
-			continue
-		}
-
-		for _, a := range r.Assets {
-			if a.Name == archiveName {
-				thisRelease := Release{a.Name, r.Tag, a.BrowserDownloadURL, a.Size}
-				allReleases = append(allReleases, thisRelease)
-				break
-			}
-		}
-	}
-
-	if len(allReleases) == 0 {
-		// no releases with suitable assets found
-		return "", "", "", fmt.Errorf("No binary releases found")
-	}
-
-	var latestRelease = Release{}
-
-	for _, r := range allReleases {
-		// detect the latest release
-		if semver.Compare(r.Tag, latestRelease.Tag) == 1 {
-			latestRelease = r
-		}
-	}
-
-	return latestRelease.Tag, latestRelease.Name, latestRelease.URL, nil
-}
-
-// GreaterThan compares the current version to a different version
-// returning < 1 not upgradeable
-func GreaterThan(toVer, fromVer string) bool {
-	return semver.Compare(toVer, fromVer) == 1
-}
-
-// GithubUpdate the running binary with the latest release binary from Github
-func GithubUpdate(repo, appName, currentVersion string) (string, error) {
-	ver, filename, downloadURL, err := GithubLatest(repo, appName)
-
-	if err != nil {
-		return "", err
-	}
-
-	if ver == currentVersion {
-		return "", fmt.Errorf("No new release found")
-	}
-
-	if semver.Compare(ver, currentVersion) < 1 {
-		return "", fmt.Errorf("No newer releases found (latest %s)", ver)
-	}
-
-	tmpDir := getTempDir()
-
-	// outFile can be a tar.gz or a zip, depending on architecture
-	outFile := filepath.Join(tmpDir, filename)
-
-	if err := downloadToFile(downloadURL, outFile); err != nil {
-		return "", err
-	}
-
-	newExec := filepath.Join(tmpDir, "mailpit")
-
-	if runtime.GOOS == "windows" {
-		if _, err := Unzip(outFile, tmpDir); err != nil {
-			return "", err
-		}
-		newExec = filepath.Join(tmpDir, "mailpit.exe")
-	} else {
-		if err := TarGZExtract(outFile, tmpDir); err != nil {
-			return "", err
-		}
-	}
-
-	if runtime.GOOS != "windows" {
-		err := os.Chmod(newExec, 0755) // #nosec
-		if err != nil {
-			return "", err
-		}
-	}
-
-	// ensure the new binary is executable (mainly for inconsistent darwin builds)
-	/* #nosec G204 */
-	cmd := exec.Command(newExec, "-h")
-	if err := cmd.Run(); err != nil {
-		return "", err
-	}
-
-	// get the running binary
-	oldExec, err := os.Executable()
-	if err != nil {
-		return "", err
-	}
-
-	if err = replaceFile(oldExec, newExec); err != nil {
-		return "", err
-	}
-
-	return ver, nil
-}
-
-// DownloadToFile downloads a URL to a file
-func downloadToFile(url, fileName string) error {
-	// Get the data
-	resp, err := http.Get(url) // #nosec
-	if err != nil {
-		return err
-	}
-	defer resp.Body.Close()
-
-	// Create the file
-	out, err := os.Create(filepath.Clean(fileName))
-	if err != nil {
-		return err
-	}
-
-	defer func() {
-		if err := out.Close(); err != nil {
-			logger.Log().Errorf("error closing file: %s", err.Error())
-		}
-	}()
-
-	// Write the body to file
-	_, err = io.Copy(out, resp.Body)
-
-	return err
-}
-
-// ReplaceFile replaces one file with another.
-// Running files cannot be overwritten, so it has to be moved
-// and the new binary saved to the original path. This requires
-// read & write permissions to both the original file and directory.
-// Note, on Windows it is not possible to delete a running program,
-// so the old exe is renamed and moved to os.TempDir()
-func replaceFile(dst, src string) error {
-	// open the source file for reading
-	source, err := os.Open(filepath.Clean(src))
-	if err != nil {
-		return err
-	}
-
-	// destination directory eg: /usr/local/bin
-	dstDir := filepath.Dir(dst)
-	// binary filename
-	binaryFilename := filepath.Base(dst)
-	// old binary tmp name
-	dstOld := fmt.Sprintf("%s.old", binaryFilename)
-	// new binary tmp name
-	dstNew := fmt.Sprintf("%s.new", binaryFilename)
-	// absolute path of new tmp file
-	newTmpAbs := filepath.Join(dstDir, dstNew)
-	// absolute path of old tmp file
-	oldTmpAbs := filepath.Join(dstDir, dstOld)
-
-	// get src permissions
-	fi, _ := os.Stat(dst)
-	srcPerms := fi.Mode().Perm()
-
-	// create the new file
-	tmpNew, err := os.OpenFile(filepath.Clean(newTmpAbs), os.O_CREATE|os.O_RDWR, srcPerms) // #nosec
-	if err != nil {
-		return err
-	}
-
-	// copy new binary to <binary>.new
-	if _, err := io.Copy(tmpNew, source); err != nil {
-		return err
-	}
-
-	// close immediately else Windows has a fit
-	if err := tmpNew.Close(); err != nil {
-		return err
-	}
-
-	if err := source.Close(); err != nil {
-		return err
-	}
-
-	// rename the current executable to <binary>.old
-	if err := os.Rename(dst, oldTmpAbs); err != nil {
-		return err
-	}
-
-	// rename the <binary>.new to current executable
-	if err := os.Rename(newTmpAbs, dst); err != nil {
-		return err
-	}
-
-	// delete the old binary
-	if runtime.GOOS == "windows" {
-		tmpDir := os.TempDir()
-		delFile := filepath.Join(tmpDir, filepath.Base(oldTmpAbs))
-		if err := os.Rename(oldTmpAbs, delFile); err != nil {
-			return err
-		}
-	} else {
-		if err := os.Remove(oldTmpAbs); err != nil {
-			return err
-		}
-	}
-
-	// remove the src file
-	return os.Remove(src)
-}
-
-// GetTempDir will create & return a temporary directory if one has not been specified
-func getTempDir() string {
-	if tempDir == "" {
-		randBytes := make([]byte, 6)
-		if _, err := rand.Read(randBytes); err != nil {
-			panic(err)
-		}
-		tempDir = filepath.Join(os.TempDir(), "updater-"+hex.EncodeToString(randBytes))
-	}
-	if err := mkDirIfNotExists(tempDir); err != nil {
-		// need a better way to exit
-		logger.Log().Errorf("error: %s", err.Error())
-		os.Exit(2)
-	}
-
-	return tempDir
-}
-
-// MkDirIfNotExists will create a directory if it doesn't exist
-func mkDirIfNotExists(path string) error {
-	if !isDir(path) {
-		return os.MkdirAll(path, os.ModePerm) // #nosec
-	}
-
-	return nil
-}
-
-// IsDir returns if a path is a directory
-func isDir(path string) bool {
-	info, err := os.Stat(path)
-	if os.IsNotExist(err) || !info.IsDir() {
-		return false
-	}
-
-	return true
-}

main.go

@@ -1,3 +1,4 @@
+// Package main is the entrypoint
 package main
 
 import (
@@ -10,26 +11,11 @@ import (
 )
 
 func main() {
-	exec, err := os.Executable()
-	if err != nil {
-		panic(err)
-	}
-
-	// running directly
-	if normalize(filepath.Base(exec)) == normalize(filepath.Base(os.Args[0])) ||
-		!strings.Contains(filepath.Base(os.Args[0]), "sendmail") {
-		cmd.Execute()
-	} else {
-		// symlinked as "*sendmail*"
+	// if the command executable contains "send" in the name (eg: sendmail), then run the sendmail command
+	if strings.Contains(strings.ToLower(filepath.Base(os.Args[0])), "send") {
 		sendmail.Run()
+	} else {
+		// else run mailpit
+		cmd.Execute()
 	}
 }
-
-// Normalize returns a lowercase string stripped of the file extension (if exists).
-// Used for detecting Windows commands which ignores letter casing and `.exe`.
-// eg: "MaIlpIT.Exe" returns "mailpit"
-func normalize(s string) string {
-	s = strings.ToLower(s)
-
-	return strings.TrimSuffix(s, filepath.Ext(s))
-}

package.json

@@ -1,25 +1,28 @@
 {
   "name": "mailpit",
   "version": "0.0.0",
+  "type": "module",
   "private": true,
   "scripts": {
     "build": "MINIFY=true node esbuild.config.mjs",
     "watch": "WATCH=true node esbuild.config.mjs",
     "package": "MINIFY=true node esbuild.config.mjs",
-    "update-caniemail": "wget -O internal/htmlcheck/caniemail-data.json https://www.caniemail.com/api/data.json"
+    "update-caniemail": "wget -O internal/htmlcheck/caniemail-data.json https://www.caniemail.com/api/data.json",
+    "lint": "eslint --max-warnings 0 && prettier -c .",
+    "lint-fix": "eslint --fix && prettier --write ."
   },
   "dependencies": {
-    "axios": "^1.2.1",
+    "axios": "^1.11.0",
     "bootstrap": "^5.2.0",
     "bootstrap-icons": "^1.9.1",
     "bootstrap5-tags": "^1.6.1",
     "color-hash": "^2.0.2",
     "dayjs": "^1.11.10",
     "dompurify": "^3.1.6",
+    "highlight.js": "^11.11.1",
     "ical.js": "^2.0.1",
     "mitt": "^3.0.1",
     "modern-screenshot": "^4.4.30",
-    "prismjs": "^1.29.0",
     "rapidoc": "^9.3.4",
     "timezones-list": "^3.0.3",
     "vue": "^3.2.13",
@@ -27,12 +30,22 @@
     "vue-router": "^4.2.4"
   },
   "devDependencies": {
+    "@eslint/compat": "^1.3.1",
     "@popperjs/core": "^2.11.5",
     "@types/bootstrap": "^5.2.7",
     "@types/tinycon": "^0.6.3",
     "@vue/compiler-sfc": "^3.2.37",
-    "esbuild": "^0.25.0",
+    "esbuild": "^0.27.2",
     "esbuild-plugin-vue-next": "^0.1.4",
-    "esbuild-sass-plugin": "^3.0.0"
+    "esbuild-sass-plugin": "^3.0.0",
+    "eslint": "^9.29.0",
+    "eslint-config-prettier": "^10.1.5",
+    "eslint-plugin-vue": "^10.2.0",
+    "prettier": "^3.5.3"
+  },
+  "prettier": {
+    "tabWidth": 4,
+    "useTabs": true,
+    "printWidth": 120
   }
 }

sendmail/cmd/cmd.go

@@ -121,14 +121,14 @@ func Run() {
 	// handles `sendmail -bs`
 	// telnet directly to SMTP
 	if UseB && UseS {
-		var caller telnet.Caller = telnet.StandardCaller
-
-		if isSocket {
+		var caller = telnet.StandardCaller
+		switch isSocket {
+		case true:
 			if err := telnet.DialToAndCallUnix(socketAddr, caller); err != nil {
 				fmt.Println(err)
 				os.Exit(1)
 			}
-		} else {
+		default:
 			if err := telnet.DialToAndCall(SMTPAddr, caller); err != nil {
 				fmt.Println(err)
 				os.Exit(1)

sendmail/cmd/smtp.go

@@ -2,11 +2,14 @@
 package cmd
 
 import (
+	"crypto/tls"
+	"errors"
 	"fmt"
 	"net"
 	"net/mail"
 	"net/smtp"
 	"os"
+	"strings"
 
 	"github.com/axllent/mailpit/internal/logger"
 )
@@ -27,7 +30,7 @@ func Send(addr string, from string, to []string, msg []byte) error {
 	}
 
 	if !isSocket {
-		return smtp.SendMail(addr, nil, fromAddress.Address, to, msg)
+		return sendMail(addr, nil, fromAddress.Address, to, msg)
 	}
 
 	conn, err := net.Dial("unix", socketPath)
@@ -69,3 +72,76 @@ func Send(addr string, from string, to []string, msg []byte) error {
 
 	return nil
 }
+
+func sendMail(addr string, a smtp.Auth, from string, to []string, msg []byte) error {
+	if err := validateLine(from); err != nil {
+		return err
+	}
+
+	for _, recipient := range to {
+		if err := validateLine(recipient); err != nil {
+			return err
+		}
+	}
+
+	c, err := smtp.Dial(addr)
+	if err != nil {
+		return err
+	}
+	defer func() { _ = c.Close() }()
+
+	if err = c.Hello(addr); err != nil {
+		return err
+	}
+
+	if ok, _ := c.Extension("STARTTLS"); ok {
+		config := &tls.Config{ServerName: addr, InsecureSkipVerify: true} // #nosec
+		if err = c.StartTLS(config); err != nil {
+			return err
+		}
+	}
+
+	if a != nil {
+		if ok, _ := c.Extension("AUTH"); !ok {
+			return errors.New("smtp: server doesn't support AUTH")
+		}
+		if err = c.Auth(a); err != nil {
+			return err
+		}
+	}
+
+	if err = c.Mail(from); err != nil {
+		return err
+	}
+
+	for _, addr := range to {
+		if err = c.Rcpt(addr); err != nil {
+			return err
+		}
+	}
+
+	w, err := c.Data()
+	if err != nil {
+		return err
+	}
+
+	_, err = w.Write(msg)
+	if err != nil {
+		return err
+	}
+
+	err = w.Close()
+	if err != nil {
+		return err
+	}
+
+	return c.Quit()
+}
+
+// validateLine checks to see if a line has CR or LF as per RFC 5321.
+func validateLine(line string) error {
+	if strings.ContainsAny(line, "\n\r") {
+		return errors.New("smtp: A line must not contain CR or LF")
+	}
+	return nil
+}

server/apiv1/api.go

@@ -18,7 +18,7 @@ func fourOFour(w http.ResponseWriter) {
 	w.Header().Set("Content-Security-Policy", config.ContentSecurityPolicy)
 	w.WriteHeader(http.StatusNotFound)
 	w.Header().Set("Content-Type", "text/plain")
-	fmt.Fprint(w, "404 page not found")
+	_, _ = fmt.Fprint(w, "404 page not found")
 }
 
 // HTTPError returns a basic error message (400 response)
@@ -27,7 +27,7 @@ func httpError(w http.ResponseWriter, msg string) {
 	w.Header().Set("Content-Security-Policy", config.ContentSecurityPolicy)
 	w.WriteHeader(http.StatusBadRequest)
 	w.Header().Set("Content-Type", "text/plain")
-	fmt.Fprint(w, msg)
+	_, _ = fmt.Fprint(w, msg)
 }
 
 // httpJSONError returns a basic error message (400 response) in JSON format
@@ -35,9 +35,7 @@ func httpJSONError(w http.ResponseWriter, msg string) {
 	w.Header().Set("Referrer-Policy", "no-referrer")
 	w.Header().Set("Content-Security-Policy", config.ContentSecurityPolicy)
 	w.WriteHeader(http.StatusBadRequest)
-	e := JSONErrorMessage{
-		Error: msg,
-	}
+	e := struct{ Error string }{Error: msg}
 
 	w.Header().Add("Content-Type", "application/json")
 	if err := json.NewEncoder(w).Encode(e); err != nil {
@@ -57,7 +55,7 @@ func getStartLimit(req *http.Request) (start int, beforeTS int64, limit int) {
 	}
 
 	l := req.URL.Query().Get("limit")
-	if n, err := strconv.Atoi(l); err == nil && n > 0 {
+	if n, err := strconv.Atoi(l); err == nil && n > -1 {
 		limit = n
 	}
 

server/apiv1/application.go

@@ -10,16 +10,7 @@ import (
 	"github.com/axllent/mailpit/internal/stats"
 )
 
-// Application information
-// swagger:response AppInfoResponse
-type appInfoResponse struct {
-	// Application information
-	//
-	// in: body
-	Body stats.AppInformation
-}
-
-// AppInfo returns some basic details about the running app, and latest release.
+// AppInfo returns some basic details about the running app including the latest release (unless disabled).
 func AppInfo(w http.ResponseWriter, _ *http.Request) {
 	// swagger:route GET /api/v1/info application AppInformation
 	//
@@ -37,58 +28,14 @@ func AppInfo(w http.ResponseWriter, _ *http.Request) {
 	//		400: ErrorResponse
 
 	w.Header().Add("Content-Type", "application/json")
-	if err := json.NewEncoder(w).Encode(stats.Load()); err != nil {
+	if err := json.NewEncoder(w).Encode(stats.Load(true)); err != nil {
 		httpError(w, err.Error())
 	}
 }
 
-// Response includes global web UI settings
-//
-// swagger:model WebUIConfiguration
-type webUIConfiguration struct {
-	// Optional label to identify this Mailpit instance
-	Label string
-	// Message Relay information
-	MessageRelay struct {
-		// Whether message relaying (release) is enabled
-		Enabled bool
-		// The configured SMTP server address
-		SMTPServer string
-		// Enforced Return-Path (if set) for relay bounces
-		ReturnPath string
-		// Only allow relaying to these recipients (regex)
-		AllowedRecipients string
-		// Block relaying to these recipients (regex)
-		BlockedRecipients string
-		// Overrides the "From" address for all relayed messages
-		OverrideFrom string
-		// DEPRECATED 2024/03/12
-		// swagger:ignore
-		RecipientAllowlist string
-	}
-
-	// Whether SpamAssassin is enabled
-	SpamAssassin bool
-
-	// Whether Chaos support is enabled at runtime
-	ChaosEnabled bool
-
-	// Whether messages with duplicate IDs are ignored
-	DuplicatesIgnored bool
-}
-
-// Web UI configuration response
-// swagger:response WebUIConfigurationResponse
-type webUIConfigurationResponse struct {
-	// Web UI configuration settings
-	//
-	// in: body
-	Body webUIConfiguration
-}
-
 // WebUIConfig returns configuration settings for the web UI.
 func WebUIConfig(w http.ResponseWriter, _ *http.Request) {
-	// swagger:route GET /api/v1/webui application WebUIConfiguration
+	// swagger:route GET /api/v1/webui application WebUIConfigurationResponse
 	//
 	// # Get web UI configuration
 	//
@@ -104,26 +51,29 @@ func WebUIConfig(w http.ResponseWriter, _ *http.Request) {
 	//	  200: WebUIConfigurationResponse
 	//	  400: ErrorResponse
 
-	conf := webUIConfiguration{}
+	conf := webUIConfigurationResponse{}
 
-	conf.Label = config.Label
-	conf.MessageRelay.Enabled = config.ReleaseEnabled
+	conf.Body.Label = config.Label
+	conf.Body.MessageRelay.Enabled = config.ReleaseEnabled
 	if config.ReleaseEnabled {
-		conf.MessageRelay.SMTPServer = fmt.Sprintf("%s:%d", config.SMTPRelayConfig.Host, config.SMTPRelayConfig.Port)
-		conf.MessageRelay.ReturnPath = config.SMTPRelayConfig.ReturnPath
-		conf.MessageRelay.AllowedRecipients = config.SMTPRelayConfig.AllowedRecipients
-		conf.MessageRelay.BlockedRecipients = config.SMTPRelayConfig.BlockedRecipients
-		conf.MessageRelay.OverrideFrom = config.SMTPRelayConfig.OverrideFrom
+		conf.Body.MessageRelay.SMTPServer = fmt.Sprintf("%s:%d", config.SMTPRelayConfig.Host, config.SMTPRelayConfig.Port)
+		conf.Body.MessageRelay.ReturnPath = config.SMTPRelayConfig.ReturnPath
+		conf.Body.MessageRelay.AllowedRecipients = config.SMTPRelayConfig.AllowedRecipients
+		conf.Body.MessageRelay.BlockedRecipients = config.SMTPRelayConfig.BlockedRecipients
+		conf.Body.MessageRelay.OverrideFrom = config.SMTPRelayConfig.OverrideFrom
+		conf.Body.MessageRelay.PreserveMessageIDs = config.SMTPRelayConfig.PreserveMessageIDs
+
 		// DEPRECATED 2024/03/12
-		conf.MessageRelay.RecipientAllowlist = config.SMTPRelayConfig.AllowedRecipients
+		conf.Body.MessageRelay.RecipientAllowlist = config.SMTPRelayConfig.AllowedRecipients
 	}
 
-	conf.SpamAssassin = config.EnableSpamAssassin != ""
-	conf.ChaosEnabled = chaos.Enabled
-	conf.DuplicatesIgnored = config.IgnoreDuplicateIDs
+	conf.Body.SpamAssassin = config.EnableSpamAssassin != ""
+	conf.Body.ChaosEnabled = chaos.Enabled
+	conf.Body.DuplicatesIgnored = config.IgnoreDuplicateIDs
+	conf.Body.HideDeleteAllButton = config.HideDeleteAllButton
 
 	w.Header().Add("Content-Type", "application/json")
-	if err := json.NewEncoder(w).Encode(conf); err != nil {
+	if err := json.NewEncoder(w).Encode(conf.Body); err != nil {
 		httpError(w, err.Error())
 	}
 }

server/apiv1/chaos.go

@@ -7,20 +7,6 @@ import (
 	"github.com/axllent/mailpit/internal/smtpd/chaos"
 )
 
-// ChaosTriggers is the Chaos configuration
-//
-// swagger:model Triggers
-type ChaosTriggers chaos.Triggers
-
-// Response for the Chaos triggers configuration
-// swagger:response ChaosResponse
-type chaosResponse struct {
-	// The current Chaos triggers
-	//
-	// in: body
-	Body ChaosTriggers
-}
-
 // GetChaos returns the current Chaos triggers
 func GetChaos(w http.ResponseWriter, _ *http.Request) {
 	// swagger:route GET /api/v1/chaos testing getChaos
@@ -52,12 +38,6 @@ func GetChaos(w http.ResponseWriter, _ *http.Request) {
 	}
 }
 
-// swagger:parameters setChaosParams
-type setChaosParams struct {
-	// in: body
-	Body ChaosTriggers
-}
-
 // SetChaos sets the Chaos configuration.
 func SetChaos(w http.ResponseWriter, r *http.Request) {
 	// swagger:route PUT /api/v1/chaos testing setChaosParams

server/apiv1/message.go

@@ -11,15 +11,6 @@ import (
 	"github.com/gorilla/mux"
 )
 
-// swagger:parameters GetMessageParams
-type getMessageParams struct {
-	// Message database ID or "latest"
-	//
-	// in: path
-	// required: true
-	ID string
-}
-
 // GetMessage (method: GET) returns the Message as JSON
 func GetMessage(w http.ResponseWriter, r *http.Request) {
 	// swagger:route GET /api/v1/message/{ID} message GetMessageParams
@@ -49,7 +40,7 @@ func GetMessage(w http.ResponseWriter, r *http.Request) {
 		id, err = storage.LatestID(r)
 		if err != nil {
 			w.WriteHeader(404)
-			fmt.Fprint(w, err.Error())
+			_, _ = fmt.Fprint(w, err.Error())
 			return
 		}
 	}
@@ -66,19 +57,6 @@ func GetMessage(w http.ResponseWriter, r *http.Request) {
 	}
 }
 
-// swagger:parameters GetHeadersParams
-type getHeadersParams struct {
-	// Message database ID or "latest"
-	//
-	// in: path
-	// required: true
-	ID string
-}
-
-// Message headers
-// swagger:model MessageHeadersResponse
-type messageHeaders map[string][]string
-
 // GetHeaders (method: GET) returns the message headers as JSON
 func GetHeaders(w http.ResponseWriter, r *http.Request) {
 	// swagger:route GET /api/v1/message/{ID}/headers message GetHeadersParams
@@ -108,7 +86,7 @@ func GetHeaders(w http.ResponseWriter, r *http.Request) {
 		id, err = storage.LatestID(r)
 		if err != nil {
 			w.WriteHeader(404)
-			fmt.Fprint(w, err.Error())
+			_, _ = fmt.Fprint(w, err.Error())
 			return
 		}
 	}
@@ -132,21 +110,6 @@ func GetHeaders(w http.ResponseWriter, r *http.Request) {
 	}
 }
 
-// swagger:parameters AttachmentParams
-type attachmentParams struct {
-	// Message database ID or "latest"
-	//
-	// in: path
-	// required: true
-	ID string
-
-	// Attachment part ID
-	//
-	// in: path
-	// required: true
-	PartID string
-}
-
 // DownloadAttachment (method: GET) returns the attachment data
 func DownloadAttachment(w http.ResponseWriter, r *http.Request) {
 	// swagger:route GET /api/v1/message/{ID}/part/{PartID} message AttachmentParams
@@ -179,7 +142,7 @@ func DownloadAttachment(w http.ResponseWriter, r *http.Request) {
 		id, err = storage.LatestID(r)
 		if err != nil {
 			w.WriteHeader(404)
-			fmt.Fprint(w, err.Error())
+			_, _ = fmt.Fprint(w, err.Error())
 			return
 		}
 	}
@@ -199,15 +162,6 @@ func DownloadAttachment(w http.ResponseWriter, r *http.Request) {
 	_, _ = w.Write(a.Content)
 }
 
-// swagger:parameters DownloadRawParams
-type downloadRawParams struct {
-	// Message database ID or "latest"
-	//
-	// in: path
-	// required: true
-	ID string
-}
-
 // DownloadRaw (method: GET) returns the full email source as plain text
 func DownloadRaw(w http.ResponseWriter, r *http.Request) {
 	// swagger:route GET /api/v1/message/{ID}/raw message DownloadRawParams
@@ -238,7 +192,7 @@ func DownloadRaw(w http.ResponseWriter, r *http.Request) {
 		id, err = storage.LatestID(r)
 		if err != nil {
 			w.WriteHeader(404)
-			fmt.Fprint(w, err.Error())
+			_, _ = fmt.Fprint(w, err.Error())
 			return
 		}
 	}

server/apiv1/messages.go

@@ -6,52 +6,27 @@ import (
 	"strings"
 
 	"github.com/axllent/mailpit/internal/storage"
+	"github.com/axllent/mailpit/internal/tools"
 )
 
-// swagger:parameters GetMessagesParams
-type getMessagesParams struct {
-	// Pagination offset
-	//
-	// in: query
-	// name: start
-	// required: false
-	// default: 0
-	// type: integer
-	Start int `json:"start"`
-
-	// Limit number of results
-	//
-	// in: query
-	// name: limit
-	// required: false
-	// default: 50
-	// type: integer
-	Limit int `json:"limit"`
-}
-
-// Summary of messages
-// swagger:response MessagesSummaryResponse
-type messagesSummaryResponse struct {
-	// The messages summary
-	// in: body
-	Body MessagesSummary
-}
-
 // MessagesSummary is a summary of a list of messages
 type MessagesSummary struct {
 	// Total number of messages in mailbox
-	Total float64 `json:"total"`
+	Total uint64 `json:"total"`
 
 	// Total number of unread messages in mailbox
-	Unread float64 `json:"unread"`
+	Unread uint64 `json:"unread"`
 
 	// Legacy - now undocumented in API specs but left for backwards compatibility.
 	// Removed from API documentation 2023-07-12
 	// swagger:ignore
-	Count float64 `json:"count"`
+	Count uint64 `json:"count"`
 
 	// Total number of messages matching current query
-	MessagesCount float64 `json:"messages_count"`
+	MessagesCount uint64 `json:"messages_count"`
+
+	// Total number of unread messages matching current query
+	MessagesUnreadCount uint64 `json:"messages_unread"`
 
 	// Pagination offset
 	Start int `json:"start"`
@@ -95,11 +70,12 @@ func GetMessages(w http.ResponseWriter, r *http.Request) {
 
 	res.Start = start
 	res.Messages = messages
-	res.Count = float64(len(messages)) // legacy - now undocumented in API specs
+	res.Count = uint64(len(messages)) // legacy - now undocumented in API specs
 	res.Total = stats.Total
 	res.Unread = stats.Unread
 	res.Tags = stats.Tags
 	res.MessagesCount = stats.Total
+	res.MessagesUnreadCount = stats.Unread
 
 	w.Header().Add("Content-Type", "application/json")
 	if err := json.NewEncoder(w).Encode(res); err != nil {
@@ -107,33 +83,14 @@ func GetMessages(w http.ResponseWriter, r *http.Request) {
 	}
 }
 
-// swagger:parameters SetReadStatusParams
-type setReadStatusParams struct {
-	// in: body
-	Body struct {
-		// Read status
-		//
-		// required: false
-		// default: false
-		// example: true
-		Read bool
-
-		// Array of message database IDs
-		//
-		// required: false
-		// example: ["4oRBnPtCXgAqZniRhzLNmS", "hXayS6wnCgNnt6aFTvmOF6"]
-		IDs []string
-	}
-}
-
-// SetReadStatus (method: PUT) will update the status to Read/Unread for all provided IDs
-// If no IDs are provided then all messages are updated.
+// SetReadStatus (method: PUT) will update the status to Read/Unread for all provided IDs.
 func SetReadStatus(w http.ResponseWriter, r *http.Request) {
 	// swagger:route PUT /api/v1/messages messages SetReadStatusParams
 	//
 	// # Set read status
 	//
-	// If no IDs are provided then all messages are updated.
+	// You can optionally provide an array of IDs or a search string.
+	// If neither IDs nor search is provided then all mailbox messages are updated.
 	//
 	//	Consumes:
 	//	  - application/json
@@ -150,8 +107,9 @@ func SetReadStatus(w http.ResponseWriter, r *http.Request) {
 	decoder := json.NewDecoder(r.Body)
 
 	var data struct {
-		Read bool
-		IDs  []string
+		Read   bool
+		IDs    []string
+		Search string
 	}
 
 	err := decoder.Decode(&data)
@@ -161,8 +119,20 @@ func SetReadStatus(w http.ResponseWriter, r *http.Request) {
 	}
 
 	ids := data.IDs
+	search := data.Search
 
-	if len(ids) == 0 {
+	if len(ids) > 0 && search != "" {
+		httpError(w, "You may specify either IDs or a search query, not both")
+		return
+	}
+
+	if search != "" {
+		err := storage.SetSearchReadStatus(search, r.URL.Query().Get("tz"), data.Read)
+		if err != nil {
+			httpError(w, err.Error())
+			return
+		}
+	} else if len(ids) == 0 {
 		if data.Read {
 			err := storage.MarkAllRead()
 			if err != nil {
@@ -178,18 +148,14 @@ func SetReadStatus(w http.ResponseWriter, r *http.Request) {
 		}
 	} else {
 		if data.Read {
-			for _, id := range ids {
-				if err := storage.MarkRead(id); err != nil {
-					httpError(w, err.Error())
-					return
-				}
+			if err := storage.MarkRead(ids); err != nil {
+				httpError(w, err.Error())
+				return
 			}
 		} else {
-			for _, id := range ids {
-				if err := storage.MarkUnread(id); err != nil {
-					httpError(w, err.Error())
-					return
-				}
+			if err := storage.MarkUnread(ids); err != nil {
+				httpError(w, err.Error())
+				return
 			}
 		}
 	}
@@ -198,19 +164,6 @@ func SetReadStatus(w http.ResponseWriter, r *http.Request) {
 	_, _ = w.Write([]byte("ok"))
 }
 
-// swagger:parameters DeleteMessagesParams
-type deleteMessagesParams struct {
-	// Delete request
-	// in: body
-	Body struct {
-		// Array of message database IDs
-		//
-		// required: false
-		// example: ["4oRBnPtCXgAqZniRhzLNmS", "hXayS6wnCgNnt6aFTvmOF6"]
-		IDs []string
-	}
-}
-
 // DeleteMessages (method: DELETE) deletes all messages matching IDS.
 func DeleteMessages(w http.ResponseWriter, r *http.Request) {
 	// swagger:route DELETE /api/v1/messages messages DeleteMessagesParams
@@ -252,37 +205,6 @@ func DeleteMessages(w http.ResponseWriter, r *http.Request) {
 	_, _ = w.Write([]byte("ok"))
 }
 
-// swagger:parameters SearchParams
-type searchParams struct {
-	// Search query
-	//
-	// in: query
-	// required: true
-	// type: string
-	Query string `json:"query"`
-
-	// Pagination offset
-	//
-	// in: query
-	// required: false
-	// type integer
-	Start string `json:"start"`
-
-	// Limit results
-	//
-	// in: query
-	// required: false
-	// type integer
-	Limit string `json:"limit"`
-
-	// [Timezone identifier](https://en.wikipedia.org/wiki/List_of_tz_database_time_zones) used only for `before:` & `after:` searches (eg: "Pacific/Auckland").
-	//
-	// in: query
-	// required: false
-	// type string
-	TZ string `json:"tz"`
-}
-
 // Search returns the latest messages as JSON
 func Search(w http.ResponseWriter, r *http.Request) {
 	// swagger:route GET /api/v1/search messages SearchParams
@@ -320,35 +242,26 @@ func Search(w http.ResponseWriter, r *http.Request) {
 
 	res.Start = start
 	res.Messages = messages
-	res.Count = float64(len(messages)) // legacy - now undocumented in API specs
-	res.Total = stats.Total            // total messages in mailbox
-	res.MessagesCount = float64(results)
+	res.Count = tools.SafeUint64(len(messages)) // legacy - now undocumented in API specs
+	res.Total = stats.Total                     // total messages in mailbox
+	res.MessagesCount = tools.SafeUint64(results)
 	res.Unread = stats.Unread
 	res.Tags = stats.Tags
 
+	unread, err := storage.SearchUnreadCount(search, r.URL.Query().Get("tz"), beforeTS)
+	if err != nil {
+		httpError(w, err.Error())
+		return
+	}
+
+	res.MessagesUnreadCount = tools.SafeUint64(unread)
+
 	w.Header().Add("Content-Type", "application/json")
 	if err := json.NewEncoder(w).Encode(res); err != nil {
 		httpError(w, err.Error())
 	}
 }
 
-// swagger:parameters DeleteSearchParams
-type deleteSearchParams struct {
-	// Search query
-	//
-	// in: query
-	// required: true
-	// type: string
-	Query string `json:"query"`
-
-	// [Timezone identifier](https://en.wikipedia.org/wiki/List_of_tz_database_time_zones) used only for `before:` & `after:` searches (eg: "Pacific/Auckland").
-	//
-	// in: query
-	// required: false
-	// type string
-	TZ string `json:"tz"`
-}
-
 // DeleteSearch will delete all messages matching a search
 func DeleteSearch(w http.ResponseWriter, r *http.Request) {
 	// swagger:route DELETE /api/v1/search messages DeleteSearchParams