Merge branch 'release/v1.29.2'

By default all internal HTTP requests are now blocked, unless mailpit is started with the `--allow-internal-http-requests` flag (env  `MP_ALLOW_INTERNAL_HTTP_REQUESTS=true`).

.github/FUNDING.yml

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

.github/SECURITY.md

@@ -2,10 +2,12 @@
 
 Your efforts to responsibly disclose your findings are appreciated.
 
-** **Please do _not_ report security vulnerabilities through public GitHub issues.** **
+**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.
+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:
 
@@ -14,6 +16,6 @@ Your report should include:
 - 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. 
+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

@@ -28,6 +28,7 @@ trim = true
 # 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"},

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

@@ -8,7 +8,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v5
+      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@v5
+      uses: actions/checkout@v6
 
     - name: Set up QEMU
       uses: docker/setup-qemu-action@v3

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

@@ -10,12 +10,13 @@ jobs:
       issues: write
       pull-requests: write
     steps:
-      - uses: actions/stale@v10.0.0
+      - 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@v5
+      uses: actions/checkout@v6
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL

.github/workflows/release-build.yml

@@ -21,10 +21,10 @@ jobs:
           - goarch: arm
             goos: windows
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
 
     # build the assets
-    - uses: actions/setup-node@v5
+    - uses: actions/setup-node@v6
       with:
         node-version: 22
         cache: 'npm'

.github/workflows/tests-rqlite.yml

@@ -17,7 +17,7 @@ jobs:
           # the HTTP address the rqlite node should advertise
           HTTP_ADV_ADDR: "localhost:4001"
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Setup Go
         uses: actions/setup-go@v6
         with:

.github/workflows/tests.yml

@@ -16,9 +16,9 @@ jobs:
       with:
         go-version: ${{ matrix.go-version }}
         cache: false
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - name: Set up Go environment
-      uses: actions/cache@v4
+      uses: actions/cache@v5
       with:
         path: |
           ~/.cache/go-build
@@ -38,7 +38,7 @@ jobs:
     # build the assets
     - name: Set up node environment
       if: startsWith(matrix.os, 'ubuntu') == true
-      uses: actions/setup-node@v5
+      uses: actions/setup-node@v6
       with:
         node-version: 22
         cache: 'npm'
@@ -52,9 +52,10 @@ jobs:
       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

CHANGELOG.md

@@ -2,6 +2,139 @@
 
 Notable changes to Mailpit will be documented in this file.
 
+## [v1.29.2]
+
+### Security
+- Prevent Server-Side Request Forgery (SSRF) via Link Check API ([GHSA-mpf7-p9x7-96r3](https://github.com/axllent/mailpit/security/advisories/GHSA-mpf7-p9x7-96r3))
+
+### Chore
+- Upgrade eslint JavaScript linting
+- Update Go dependencies
+- Update node dependencies
+- Update caniemail test database
+
+### Fix
+- Update install instructions when setting INSTALL_PATH
+- Include 8BITMIME in SMTPD EHLO response ([#648](https://github.com/axllent/mailpit/issues/648))
+
+
+## [v1.29.1]
+
+### Chore
+- Add CORS error logging and update error messages for failed CORS requests
+- Bump axios from 1.13.4 to 1.13.5
+- Update Go dependencies
+- Update node dependencies
+
+### Fix
+- Enable "Mark all read" button (Inbox) when new message is received
+
+
+## [v1.29.0]
+
+### Feature
+- Include message attachment checksums (MD5, SHA1 & SHA254) in API message summary
+- Option to display/hide attachment information in message view in web UI including checksums, content type & disposition
+
+### Chore
+- Add support for multi-origin CORS settings and apply to events websocket ([#630](https://github.com/axllent/mailpit/issues/630))
+- Add support for webhook delay ([#627](https://github.com/axllent/mailpit/issues/627))
+- Update Go dependencies
+- Update node dependencies
+
+### Test
+- Add CORS tests
+- Add message summary attachment checksum tests
+
+
+## [v1.28.4]
+
+### Chore
+- Increase allowed SMTP email address length to 1024 chars & return clearer SMTP responses for failures ([#620](https://github.com/axllent/mailpit/issues/620))
+- Update Go dependencies
+- Update node dependencies
+
+### Fix
+- Ensure SMTP HELO/EHLO command is issued before MAIL FROM as per RFC 5321 ([#621](https://github.com/axllent/mailpit/issues/621))
+- Prevent nested MAIL command during an active SMTP transaction ([#623](https://github.com/axllent/mailpit/issues/623))
+- Avoid error on image type assertion in thumbnail generation
+
+
+## [v1.28.3]
+
+### Security
+- Ensure SMTP TO & FROM addresses are RFC 5322 compliant and prevent header injection ([GHSA-54wq-72mp-cq7c](https://github.com/axllent/mailpit/security/advisories/GHSA-54wq-72mp-cq7c))
+- Prevent Server-Side Request Forgery (SSRF) via HTML Check API ([GHSA-6jxm-fv7w-rw5j](https://github.com/axllent/mailpit/security/advisories/GHSA-6jxm-fv7w-rw5j))
+
+### Chore
+- Fix formatting and update reporting instructions in SECURITY.md ([#614](https://github.com/axllent/mailpit/issues/614))
+- Allow `@` character in message tags & set max length to 100 characters per tag
+- Update Go dependencies
+- Update node dependencies
+
+### Fix
+- Correctly render default addresses in release modal after settings change ([#594](https://github.com/axllent/mailpit/issues/594))
+- Correctly detect macOS group in install.sh ([#619](https://github.com/axllent/mailpit/issues/619))
+- Auto-tagging using SMTP username using plain auth ([#617](https://github.com/axllent/mailpit/issues/617))
+- Validate maximum lengths of email addresses - RFC5321 (section 4.5.3.1)
+
+### Test
+- Update tag tests with length limits and `@` character
+- Add SMTP tests for address compliancy (RFC 5322) and header injection
+- Add maximum email length validation tests - RFC5321 (section 4.5.3.1)
+
+
+## [v1.28.2]
+
+### Security
+- Prevent Cross-Site WebSocket Hijacking (CSWSH) allowing unauthenticated access to message data [CVE-2026-22689](https://github.com/axllent/mailpit/security/advisories/GHSA-524m-q5m7-79mm)
+
+### Feature
+- Allow default mail addresses to be set when releasing message ([#594](https://github.com/axllent/mailpit/issues/594))
+
+### Chore
+- Remove webkit warnings about missing template / render functions
+- Avoid empty URL query parameter when returning to inbox from message view
+
+
+## [v1.28.1]
+
+### Security
+- Restrict screenshot proxy to only support asset links contained in messages [CVE-2026-21859](https://github.com/axllent/mailpit/security/advisories/GHSA-8v65-47jx-7mfr)
+
+### Chore
+- Bump actions/checkout from 5 to 6 ([#610](https://github.com/axllent/mailpit/issues/610))
+- Bump actions/cache from 4 to 5 ([#607](https://github.com/axllent/mailpit/issues/607))
+- Bump actions/stale from 10.0.0 to 10.1.1 ([#604](https://github.com/axllent/mailpit/issues/604))
+- Bump actions/setup-node from 5 to 6 ([#598](https://github.com/axllent/mailpit/issues/598))
+- Bump esbuild from 0.25.12 to 0.27.2 ([#611](https://github.com/axllent/mailpit/issues/611))
+- Update Go dependencies
+- Update node dependencies
+
+### Test
+- Add inline message tests
+- Increase swagger test timeout
+
+
+## [v1.28.0]
+
+### Feature
+- Optionally propagate SMTP errors ([#588](https://github.com/axllent/mailpit/issues/588))
+
+### Chore
+- Update Go dependencies
+- Update node dependencies
+- Update caniemail test database
+
+
+## [v1.27.11]
+
+### Chore
+- Update Go dependencies
+- Update node dependencies
+- Add type assertion for value in imaging assignment
+
+
 ## [v1.27.10]
 
 ### Security
@@ -81,6 +214,10 @@ Notable changes to Mailpit will be documented in this file.
 
 ## [v1.27.2]
 
+### Security
+- Prevent integer overflow conversion to uint64
+- Add ReadHeaderTimeout to Prometheus metrics server
+
 ### Feature
 - Add ability to generate self-signed (snakeoil) certificates for UI, SMTP and POP3 ([#539](https://github.com/axllent/mailpit/issues/539))
 
@@ -96,10 +233,6 @@ Notable changes to Mailpit will be documented in this file.
 - Support angle brackets for text/plain URLs with spaces ([#535](https://github.com/axllent/mailpit/issues/535))
 - Do not check latest release for Prometheus statistics ([#522](https://github.com/axllent/mailpit/issues/522))
 
-### Security
-- Prevent integer overflow conversion to uint64
-- Add ReadHeaderTimeout to Prometheus metrics server
-
 
 ## [v1.27.1]
 
@@ -1729,6 +1862,9 @@ Notable changes to Mailpit will be documented in this file.
 
 ## [1.1.4]
 
+### Security
+- Add restrictive HTTP Content-Security-Policy
+
 ### Feature
 - Add --quiet flag to display only errors
 
@@ -1737,9 +1873,6 @@ Notable changes to Mailpit will be documented in this file.
 - Add favicon unread message counter
 - Minor UI color change & unread count position adjustment
 
-### Security
-- Add restrictive HTTP Content-Security-Policy
-
 
 ## [1.1.3]
 
@@ -1826,14 +1959,14 @@ Notable changes to Mailpit will be documented in this file.
 
 ## [0.1.2]
 
-### Feature
-- Optional browser notifications (HTTPS only)
-
 ### Security
 - Use strconv.Atoi() for safe string to int conversions
 - Sanitize mailbox names
 - Don't allow tar files containing a ".."
 
+### Feature
+- Optional browser notifications (HTTPS only)
+
 
 ## [0.1.1]
 

CONTRIBUTING.md

@@ -1,16 +1,10 @@
-# 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.
+# Contributing to Mailpit
 
+Thank you for your interest in contributing to Mailpit! 
 
 ## 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).
+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. Please **do not** report security issues here (see below).
 
 
 ## Reporting security issues
@@ -18,44 +12,11 @@ If you find a bug or have a feature request, please [open an issue](https://gith
 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.
 
 
+## Contributing code
 
-## How to contribute (pull request)
+Please ensure your code is clean and well-commented, and [passes linting](https://mailpit.axllent.org/docs/development/code-linting/) before submitting a Pull Request. Contributions should enhance the functionality or usability of Mailpit, focusing on quality over quantity.
 
-1. **Fork the repository**  
-   Click the "Fork" button at the top right of this repository to create your own copy.
+Note that while assistance from AI tools is perfectly acceptable, **"[vibe coded](https://en.wikipedia.org/wiki/Vibe_coding)" pull requests will most likely not be accepted.**
+We value the unique insights and creativity that individual contributors bring to the project.
 
-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!
+Thank you for your understanding and for contributing to Mailpit!

README.md

@@ -79,7 +79,7 @@ sudo sh < <(curl -sL https://raw.githubusercontent.com/axllent/mailpit/develop/i
 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)
+sudo INSTALL_PATH=/usr/bin sh < <(curl -sL https://raw.githubusercontent.com/axllent/mailpit/develop/install.sh)
 ```
 
 
@@ -115,3 +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>

cmd/dump.go

@@ -17,7 +17,7 @@ The database can either be the database file (eg: --database /var/lib/mailpit/ma
 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(cmd *cobra.Command, args []string) {
+	Run: func(_ *cobra.Command, args []string) {
 		if err := dump.Sync(args[0]); err != nil {
 			logger.Log().Fatal(err)
 		}

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()

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

@@ -103,8 +103,9 @@ func init() {
 	rootCmd.Flags().StringVar(&config.UIAuthFile, "ui-auth-file", config.UIAuthFile, "A password file for web UI & API authentication")
 	rootCmd.Flags().StringVar(&config.UITLSCert, "ui-tls-cert", config.UITLSCert, "TLS certificate for web UI (HTTPS) - requires ui-tls-key")
 	rootCmd.Flags().StringVar(&config.UITLSKey, "ui-tls-key", config.UITLSKey, "TLS key for web UI (HTTPS) - requires ui-tls-cert")
-	rootCmd.Flags().StringVar(&server.AccessControlAllowOrigin, "api-cors", server.AccessControlAllowOrigin, "Set API CORS Access-Control-Allow-Origin header")
+	rootCmd.Flags().StringVar(&server.AccessControlAllowOrigin, "api-cors", server.AccessControlAllowOrigin, "Set CORS origin(s) for the API, comma-separated (eg: example.com,foo.com)")
 	rootCmd.Flags().BoolVar(&config.BlockRemoteCSSAndFonts, "block-remote-css-and-fonts", config.BlockRemoteCSSAndFonts, "Block access to remote CSS & fonts")
+	rootCmd.Flags().BoolVar(&config.AllowInternalHTTPRequests, "allow-internal-http-requests", config.AllowInternalHTTPRequests, "Allow link-checker & screenshots to access internal IP addresses")
 	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)")
@@ -160,6 +161,7 @@ func init() {
 	// Webhook
 	rootCmd.Flags().StringVar(&config.WebhookURL, "webhook-url", config.WebhookURL, "Send a webhook request for new messages")
 	rootCmd.Flags().IntVar(&webhook.RateLimit, "webhook-limit", webhook.RateLimit, "Limit webhook requests per second")
+	rootCmd.Flags().IntVar(&webhook.Delay, "webhook-delay", webhook.Delay, "Delay in seconds before sending webhook requests (default 0)")
 
 	// DEPRECATED FLAG 2024/04/12 - but will not be removed to maintain backwards compatibility
 	rootCmd.Flags().StringVar(&config.Database, "db-file", config.Database, "Database file to store persistent data")
@@ -249,6 +251,9 @@ func initConfigFromEnv() {
 	if getEnabledFromEnv("MP_BLOCK_REMOTE_CSS_AND_FONTS") {
 		config.BlockRemoteCSSAndFonts = true
 	}
+	if getEnabledFromEnv("MP_ALLOW_INTERNAL_HTTP_REQUESTS") {
+		config.AllowInternalHTTPRequests = true
+	}
 	if len(os.Getenv("MP_ENABLE_SPAMASSASSIN")) > 0 {
 		config.EnableSpamAssassin = os.Getenv("MP_ENABLE_SPAMASSASSIN")
 	}
@@ -332,6 +337,7 @@ func initConfigFromEnv() {
 	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")
@@ -350,6 +356,7 @@ 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")
@@ -385,6 +392,9 @@ func initConfigFromEnv() {
 	if len(os.Getenv("MP_WEBHOOK_LIMIT")) > 0 {
 		webhook.RateLimit, _ = strconv.Atoi(os.Getenv("MP_WEBHOOK_LIMIT"))
 	}
+	if len(os.Getenv("MP_WEBHOOK_DELAY")) > 0 {
+		webhook.Delay, _ = strconv.Atoi(os.Getenv("MP_WEBHOOK_DELAY"))
+	}
 
 	// Demo mode
 	config.DemoMode = getEnabledFromEnv("MP_DEMO_MODE")

cmd/version.go

@@ -14,7 +14,7 @@ var versionCmd = &cobra.Command{
 	Use:   "version",
 	Short: "Display the current version & update information",
 	Long:  `Display the current version & update information (if available).`,
-	Run: func(cmd *cobra.Command, args []string) {
+	Run: func(cmd *cobra.Command, _ []string) {
 		update, _ := cmd.Flags().GetBool("update")
 		noReleaseCheck, _ := cmd.Flags().GetBool("no-release-check")
 

config/config.go

@@ -127,11 +127,15 @@ var (
 	// BlockRemoteCSSAndFonts used to disable remote CSS & fonts
 	BlockRemoteCSSAndFonts = false
 
+	// AllowInternalHTTPRequests will allow HTTP requests to internal IP addresses (e.g., loopback, private, link-local, or multicast) when set to true.
+	// This policy applies to both link checking and screenshot generation (proxy) features and is disabled by default for security reasons.
+	AllowInternalHTTPRequests = false
+
 	// CLITagsArg is used to map the CLI args
 	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
@@ -252,6 +256,7 @@ type SMTPRelayConfigStruct struct {
 	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"`
@@ -259,18 +264,19 @@ 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
-	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
+	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
@@ -283,7 +289,8 @@ 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,
 	)
 
@@ -615,8 +622,10 @@ 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,
+			)
 		}
 	}
 

go.mod

@@ -1,34 +1,35 @@
 module github.com/axllent/mailpit
 
-go 1.24.3
+go 1.25.0
 
 require (
-	github.com/PuerkitoBio/goquery v1.10.3
+	github.com/PuerkitoBio/goquery v1.11.0
 	github.com/araddon/dateparse v0.0.0-20210429162001-6b43995a97de
-	github.com/axllent/ghru/v2 v2.0.2
+	github.com/axllent/ghru/v2 v2.1.0
 	github.com/axllent/semver v1.0.0
-	github.com/goccy/go-yaml v1.18.0
-	github.com/gomarkdown/markdown v0.0.0-20250810172220-2e2c11897d1a
+	github.com/goccy/go-yaml v1.19.2
+	github.com/gomarkdown/markdown v0.0.0-20260217112301-37c66b85d6ab
 	github.com/gorilla/mux v1.8.1
 	github.com/gorilla/websocket v1.5.3
-	github.com/jhillyerd/enmime/v2 v2.2.0
-	github.com/klauspost/compress v1.18.0
-	github.com/kovidgoyal/imaging v1.6.5
+	github.com/jhillyerd/enmime/v2 v2.3.0
+	github.com/klauspost/compress v1.18.4
+	github.com/kovidgoyal/imaging v1.8.20
 	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/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 v1.9.3
-	github.com/spf13/cobra v1.10.1
+	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 v1.25.0
-	golang.org/x/crypto v0.43.0
-	golang.org/x/net v0.46.0
-	golang.org/x/text v0.30.0
+	github.com/vanng822/go-premailer v1.31.0
+	golang.org/x/crypto v0.48.0
+	golang.org/x/net v0.50.0
+	golang.org/x/text v0.34.0
 	golang.org/x/time v0.14.0
-	modernc.org/sqlite v1.39.0
+	modernc.org/sqlite v1.46.1
 )
 
 require (
@@ -37,41 +38,44 @@ require (
 	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/uax29/v2 v2.2.0 // indirect
+	github.com/clipperhouse/displaywidth v0.11.0 // indirect
+	github.com/clipperhouse/uax29/v2 v2.7.0 // indirect
 	github.com/dustin/go-humanize v1.0.1 // indirect
 	github.com/fatih/color v1.18.0 // indirect
+	github.com/goccy/go-json v0.10.5 // 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/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 v0.0.19 // indirect
+	github.com/mattn/go-runewidth v0.0.20 // 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 v0.1.1 // indirect
-	github.com/olekukonko/tablewriter v1.1.0 // indirect
-	github.com/pkg/errors v0.9.1 // indirect
+	github.com/olekukonko/errors v1.2.0 // indirect
+	github.com/olekukonko/ll v0.1.7 // indirect
+	github.com/olekukonko/tablewriter v1.1.3 // indirect
 	github.com/prometheus/client_model v0.6.2 // indirect
-	github.com/prometheus/common v0.67.1 // indirect
-	github.com/prometheus/procfs v0.17.0 // 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
 	go.yaml.in/yaml/v2 v2.4.3 // indirect
-	golang.org/x/exp v0.0.0-20251002181428-27f1f14c8bb9 // indirect
-	golang.org/x/image v0.32.0 // indirect
-	golang.org/x/mod v0.29.0 // indirect
-	golang.org/x/sys v0.37.0 // indirect
-	google.golang.org/protobuf v1.36.10 // indirect
-	modernc.org/libc v1.66.10 // indirect
+	golang.org/x/exp v0.0.0-20260218203240-3dfff04db8fa // indirect
+	golang.org/x/image v0.36.0 // indirect
+	golang.org/x/mod v0.33.0 // indirect
+	golang.org/x/sys v0.41.0 // indirect
+	google.golang.org/protobuf v1.36.11 // indirect
+	modernc.org/libc v1.68.0 // indirect
 	modernc.org/mathutil v1.7.1 // indirect
 	modernc.org/memory v1.11.0 // indirect
 )

go.sum

@@ -1,13 +1,13 @@
 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 v1.10.3 h1:pFYcNSqHxBD06Fpj/KsbStFRsgRATgnf3LeXiUkhzPo=
-github.com/PuerkitoBio/goquery v1.10.3/go.mod h1:tMUX0zDMHXYlAQk6p35XxQMqMweEKB7iK7iLNd4RH4Y=
+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/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/ghru/v2 v2.1.0 h1:zNW96KO+rmXggizZhHzIX7MExOiV4jx+63Y9nXlwLV0=
+github.com/axllent/ghru/v2 v2.1.0/go.mod h1:8l7s1phdc375vvf8LHxT7wnJqXlThdHJR5EBtHNWhTg=
 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=
@@ -16,8 +16,10 @@ github.com/cention-sany/utf7 v0.0.0-20170124080048-26cad61bd60a h1:MISbI8sU/PSK/
 github.com/cention-sany/utf7 v0.0.0-20170124080048-26cad61bd60a/go.mod h1:2GxOXOlEPAMFPfp014mK1SWq8G8BN8o7/dfYqJrVGn8=
 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/uax29/v2 v2.2.0 h1:ChwIKnQN3kcZteTXMgb1wztSgaU+ZemkgWdohwgs8tY=
-github.com/clipperhouse/uax29/v2 v2.2.0/go.mod h1:EFJ2TJMRUaplDxHKj1qAEhCtQPW2tJSwu5BF98AuoVM=
+github.com/clipperhouse/displaywidth v0.11.0 h1:lBc6kY44VFw+TDx4I8opi/EtL9m20WSEFgwIwO+UVM8=
+github.com/clipperhouse/displaywidth v0.11.0/go.mod h1:bkrFNkf81G8HyVqmKGxsPufD3JhNl3dSqnGhOoSD/o0=
+github.com/clipperhouse/uax29/v2 v2.7.0 h1:+gs4oBZ2gPfVrKPthwbMzWZDaAFPGYK72F0NJv2v7Vk=
+github.com/clipperhouse/uax29/v2 v2.7.0/go.mod h1:EFJ2TJMRUaplDxHKj1qAEhCtQPW2tJSwu5BF98AuoVM=
 github.com/cpuguy83/go-md2man/v2 v2.0.6/go.mod h1:oOW0eioCTA6cOiMLiUPZOpcVxMig6NIQQ7OS05n1F4g=
 github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
@@ -29,12 +31,14 @@ github.com/fatih/color v1.18.0 h1:S8gINlzdQ840/4pfAwic/ZE0djQEH3wM94VfqLTZcOM=
 github.com/fatih/color v1.18.0/go.mod h1:4FelSpRwEGDpQ12mAdzqdOukCy4u8WUtOY6lkT/6HfU=
 github.com/go-test/deep v1.1.1 h1:0r/53hagsehfO4bzD2Pgr/+RgHqhmf+k1Bpse2cTu1U=
 github.com/go-test/deep v1.1.1/go.mod h1:5C2ZWiW0ErCdrYzpqxLbTX7MG14M9iiw8DgHncVwcsE=
-github.com/goccy/go-yaml v1.18.0 h1:8W7wMFS12Pcas7KU+VVkaiCng+kG8QiFeFwzFb+rwuw=
-github.com/goccy/go-yaml v1.18.0/go.mod h1:XBurs7gK8ATbW4ZPGKgcbrY1Br56PdM69F7LkFRi1kA=
+github.com/goccy/go-json v0.10.5 h1:Fq85nIqj+gXn/S5ahsiTlK3TmC85qgirsdTP/+DeaC4=
+github.com/goccy/go-json v0.10.5/go.mod h1:oq7eo15ShAhp70Anwd5lgX2pLfOS3QCiwU/PULtXL6M=
+github.com/goccy/go-yaml v1.19.2 h1:PmFC1S6h8ljIz6gMRBopkjP1TVT7xuwrButHID66PoM=
+github.com/goccy/go-yaml v1.19.2/go.mod h1:XBurs7gK8ATbW4ZPGKgcbrY1Br56PdM69F7LkFRi1kA=
 github.com/gogs/chardet v0.0.0-20211120154057-b7413eaefb8f h1:3BSP1Tbs2djlpprl7wCLuiqMaUh5SJkkzI2gDs+FgLs=
 github.com/gogs/chardet v0.0.0-20211120154057-b7413eaefb8f/go.mod h1:Pcatq5tYkCW2Q6yrR2VRHlbHpZ/R4/7qyL1TCF7vl14=
-github.com/gomarkdown/markdown v0.0.0-20250810172220-2e2c11897d1a h1:l7A0loSszR5zHd/qK53ZIHMO8b3bBSmENnQ6eKnUT0A=
-github.com/gomarkdown/markdown v0.0.0-20250810172220-2e2c11897d1a/go.mod h1:JDGcbDT52eL4fju3sZ4TeHGsQwhG9nbDV21aMyhwPoA=
+github.com/gomarkdown/markdown v0.0.0-20260217112301-37c66b85d6ab h1:VYNivV7P8IRHUam2swVUNkhIdp0LRRFKe4hXNnoZKTc=
+github.com/gomarkdown/markdown v0.0.0-20260217112301-37c66b85d6ab/go.mod h1:JDGcbDT52eL4fju3sZ4TeHGsQwhG9nbDV21aMyhwPoA=
 github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
 github.com/google/go-cmp v0.7.0 h1:wk8382ETsv4JYUZwIsn6YpYiWiBsYLSJiTsyBybVuN8=
 github.com/google/go-cmp v0.7.0/go.mod h1:pXiqmnSA92OHEEa9HXL2W4E7lf9JzCmGVUdgjX3N/iU=
@@ -48,16 +52,22 @@ github.com/gorilla/mux v1.8.1 h1:TuBL49tXwgrFYWhqrNgrUNEY92u81SPhu7sTdzQEiWY=
 github.com/gorilla/mux v1.8.1/go.mod h1:AKf9I4AEqPTmMytcMc0KkNouC66V3BtZ4qD5fmWSiMQ=
 github.com/gorilla/websocket v1.5.3 h1:saDtZ6Pbx/0u+bgYQ3q96pZgCzfhKXGPqt7kZ72aNNg=
 github.com/gorilla/websocket v1.5.3/go.mod h1:YR8l580nyteQvAITg2hZ9XVh4b55+EU/adAjf1fMHhE=
+github.com/hashicorp/golang-lru/v2 v2.0.7 h1:a+bsQ5rvGLjzHuww6tVxozPZFVghXaHOwFs4luLUK2k=
+github.com/hashicorp/golang-lru/v2 v2.0.7/go.mod h1:QeFd9opnmA6QUJc5vARoKUSoFhyfM2/ZepoAG6RGpeM=
 github.com/inbucket/html2text v1.0.0 h1:N5kza++4uBBDJ2Z3KUnTRyPNoBcW+YfOgNiNmNB+sgs=
 github.com/inbucket/html2text v1.0.0/go.mod h1:5TrhXQKGU+LXurODaSm55Y9eXoPBRnYiOz4x2XfUoJU=
 github.com/inconshreveable/mousetrap v1.1.0 h1:wN+x4NVGpMsO7ErUn/mUI3vEoE6Jt13X2s0bqwp9tc8=
 github.com/inconshreveable/mousetrap v1.1.0/go.mod h1:vpF70FUmC8bwa3OWnCshd2FqLfsEA9PFc4w1p2J65bw=
-github.com/jhillyerd/enmime/v2 v2.2.0 h1:Pe35MB96eZK5Q0XjlvPftOgWypQpd1gcbfJKAt7rsB8=
-github.com/jhillyerd/enmime/v2 v2.2.0/go.mod h1:SOBXlCemjhiV2DvHhAKnJiWrtJGS/Ffuw4Iy7NjBTaI=
-github.com/klauspost/compress v1.18.0 h1:c/Cqfb0r+Yi+JtIEq73FWXVkRonBlf0CRNYc8Zttxdo=
-github.com/klauspost/compress v1.18.0/go.mod h1:2Pp+KzxcywXVXMr50+X0Q/Lsb43OQHYWRCY2AiWywWQ=
-github.com/kovidgoyal/imaging v1.6.5 h1:Id9DKlz/ydl5Vxt9QG5IjGSiIcHcszSKXxDubdO49PQ=
-github.com/kovidgoyal/imaging v1.6.5/go.mod h1:mBprO214rATK/6OaPAUXmHbSMelPSFEmoBAt/IJdmno=
+github.com/jhillyerd/enmime/v2 v2.3.0 h1:Y/pzQanyU8nkSgB2npXX8Dha5OItJE/QwbDJM4sf/kU=
+github.com/jhillyerd/enmime/v2 v2.3.0/go.mod h1:mGKXAP45l6pF6HZiaLhgSYsgteJskaSIYmEZXpw6ZpI=
+github.com/klauspost/compress v1.18.4 h1:RPhnKRAQ4Fh8zU2FY/6ZFDwTVTxgJ/EMydqSTzE9a2c=
+github.com/klauspost/compress v1.18.4/go.mod h1:R0h/fSBs8DE4ENlcrlib3PsXS61voFxhIs2DeRhCvJ4=
+github.com/kovidgoyal/go-parallel v1.1.1 h1:1OzpNjtrUkBPq3UaqrnvOoB2F9RttSt811uiUXyI7ok=
+github.com/kovidgoyal/go-parallel v1.1.1/go.mod h1:BJNIbe6+hxyFWv7n6oEDPj3PA5qSw5OCtf0hcVxWJiw=
+github.com/kovidgoyal/go-shm v1.0.0 h1:HJEel9D1F9YhULvClEHJLawoRSj/1u/EDV7MJbBPgQo=
+github.com/kovidgoyal/go-shm v1.0.0/go.mod h1:Yzb80Xf9L3kaoB2RGok9hHwMIt7Oif61kT6t3+VnZds=
+github.com/kovidgoyal/imaging v1.8.20 h1:74GZ7C2rIm3rqmGEjK1GvvPOOnJ0SS5iDOa6Flfo0b0=
+github.com/kovidgoyal/imaging v1.8.20/go.mod h1:d3phGYkTChGYkY4y++IjpHgUGhWGELDc2NEQAqxwZZg=
 github.com/kr/pretty v0.3.1 h1:flRD4NNwYAUpkphVc1HcthR4KEIFJ65n8Mw5qdRn3LE=
 github.com/kr/pretty v0.3.1/go.mod h1:hoEshYVHaxMs3cyo3Yncou5ZscifuDolrwPKZanG3xk=
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@@ -73,8 +83,8 @@ github.com/mattn/go-colorable v0.1.14/go.mod h1:6LmQG8QLFO4G5z1gPvYEzlUgJ2wF+stg
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@@ -85,12 +95,12 @@ github.com/ncruces/go-strftime v1.0.0 h1:HMFp8mLCTPp341M/ZnA4qaf7ZlsbTc+miZjCLOF
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@@ -99,27 +109,27 @@ github.com/prometheus/client_golang v1.23.2 h1:Je96obch5RDVy3FDMndoUsjAhG5Edi49h
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@@ -140,32 +150,33 @@ github.com/valyala/bytebufferpool v1.0.0 h1:GqA5TC/0021Y/b9FG4Oi9Mr3q7XYx6Kllzaw
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@@ -175,8 +186,8 @@ golang.org/x/net v0.15.0/go.mod h1:idbUs1IY1+zTqbi8yxTbhexhEEk5ur9LInksu6HrEpk=
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@@ -184,13 +195,12 @@ golang.org/x/sync v0.3.0/go.mod h1:FU7BRWz2tNW+3quACPkgCx/L+uEAv1htQ0V83Z9Rj+Y=
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 golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220520151302-bc2c85ada10a/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.0.0-20220715151400-c0bba94af5f8/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.5.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
@@ -199,8 +209,8 @@ golang.org/x/sys v0.12.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.17.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 golang.org/x/sys v0.20.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 golang.org/x/sys v0.28.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
-golang.org/x/sys v0.37.0 h1:fdNQudmxPjkdUTPnLn5mdQv7Zwvbvpaxqs831goi9kQ=
-golang.org/x/sys v0.37.0/go.mod h1:OgkHotnGiDImocRcuBABYBEXf8A9a87e/uXjp9XT3ks=
+golang.org/x/sys v0.41.0 h1:Ivj+2Cp/ylzLiEU89QhWblYnOE9zerudt9Ftecq2C6k=
+golang.org/x/sys v0.41.0/go.mod h1:OgkHotnGiDImocRcuBABYBEXf8A9a87e/uXjp9XT3ks=
 golang.org/x/telemetry v0.0.0-20240228155512-f48c80bd79b2/go.mod h1:TeRTkGYfJXctD9OcfyVLyj2J3IxLnKwHJR8f4D8a3YE=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
@@ -219,8 +229,8 @@ 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 v0.30.0 h1:yznKA/E9zq54KzlzBEAWn1NXSQ8DIp/NYMy88xJjl4k=
-golang.org/x/text v0.30.0/go.mod h1:yDdHFIX9t+tORqspjENWgzaCVXgk0yYnYuSZ8UzzBVM=
+golang.org/x/text v0.34.0 h1:oL/Qq0Kdaqxa1KbNeMKwQq0reLCCaFtqu2eNuSeNHbk=
+golang.org/x/text v0.34.0/go.mod h1:homfLqTYRFyVYemLBFl5GgL/DWEiH5wcsQ5gSh1yziA=
 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=
@@ -229,29 +239,31 @@ 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 v0.37.0 h1:DVSRzp7FwePZW356yEAChSdNcQo6Nsp+fex1SUW09lE=
-golang.org/x/tools v0.37.0/go.mod h1:MBN5QPQtLMHVdvsbtarmTNukZDdgwdwlO5qGacAzF0w=
+golang.org/x/tools v0.42.0 h1:uNgphsn75Tdz5Ji2q36v/nsFSfR/9BRFvqhGBaJGd5k=
+golang.org/x/tools v0.42.0/go.mod h1:Ma6lCIwGZvHK6XtgbswSoWroEkhugApmsXyrUmBhfr0=
 golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
-google.golang.org/protobuf v1.36.10 h1:AYd7cD/uASjIL6Q9LiTjz8JLcrh/88q5UObnmY3aOOE=
-google.golang.org/protobuf v1.36.10/go.mod h1:HTf+CrKn2C3g5S8VImy6tdcUvCska2kB7j23XfzDpco=
+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 v1.0.0-20201130134442-10cb98267c6c 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 v4.26.5 h1:xM3bX7Mve6G8K8b+T11ReenJOT+BmVqQj0FY5T4+5Y4=
-modernc.org/cc/v4 v4.26.5/go.mod h1:uVtb5OGqUKpoLWhqwNQo/8LwvoiEBLvZXIQ/SmO6mL0=
-modernc.org/ccgo/v4 v4.28.1 h1:wPKYn5EC/mYTqBO373jKjvX2n+3+aK7+sICCv4Fjy1A=
-modernc.org/ccgo/v4 v4.28.1/go.mod h1:uD+4RnfrVgE6ec9NGguUNdhqzNIeeomeXf6CL0GTE5Q=
+modernc.org/cc/v4 v4.27.1 h1:9W30zRlYrefrDV2JE2O8VDtJ1yPGownxciz5rrbQZis=
+modernc.org/cc/v4 v4.27.1/go.mod h1:uVtb5OGqUKpoLWhqwNQo/8LwvoiEBLvZXIQ/SmO6mL0=
+modernc.org/ccgo/v4 v4.30.2 h1:4yPaaq9dXYXZ2V8s1UgrC3KIj580l2N4ClrLwnbv2so=
+modernc.org/ccgo/v4 v4.30.2/go.mod h1:yZMnhWEdW0qw3EtCndG1+ldRrVGS+bIwyWmAWzS0XEw=
 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=
 modernc.org/gc/v2 v2.6.5/go.mod h1:YgIahr1ypgfe7chRuJi2gD7DBQiKSLMPgBQe9oIiito=
+modernc.org/gc/v3 v3.1.2 h1:ZtDCnhonXSZexk/AYsegNRV1lJGgaNZJuKjJSWKyEqo=
+modernc.org/gc/v3 v3.1.2/go.mod h1:HFK/6AGESC7Ex+EZJhJ2Gni6cTaYpSMmU/cT9RmlfYY=
 modernc.org/goabi0 v0.2.0 h1:HvEowk7LxcPd0eq6mVOAEMai46V+i7Jrj13t4AzuNks=
 modernc.org/goabi0 v0.2.0/go.mod h1:CEFRnnJhKvWT1c1JTI3Avm+tgOWbkOu5oPA8eH8LnMI=
-modernc.org/libc v1.66.10 h1:yZkb3YeLx4oynyR+iUsXsybsX4Ubx7MQlSYEw4yj59A=
-modernc.org/libc v1.66.10/go.mod h1:8vGSEwvoUoltr4dlywvHqjtAqHBaw0j1jI7iFBTAr2I=
+modernc.org/libc v1.68.0 h1:PJ5ikFOV5pwpW+VqCK1hKJuEWsonkIJhhIXyuF/91pQ=
+modernc.org/libc v1.68.0/go.mod h1:NnKCYeoYgsEqnY3PgvNgAeaJnso968ygU8Z0DxjoEc0=
 modernc.org/mathutil v1.7.1 h1:GCZVGXdaN8gTqB1Mf/usp1Y/hSqgI2vAGGP4jZMCxOU=
 modernc.org/mathutil v1.7.1/go.mod h1:4p5IwJITfppl0G4sUEDtCr4DthTaT47/N3aT6MhfgJg=
 modernc.org/memory v1.11.0 h1:o4QC8aMQzmcwCK3t3Ux/ZHmwFPzE6hf2Y5LbkRs+hbI=
@@ -260,8 +272,8 @@ modernc.org/opt v0.1.4 h1:2kNGMRiUjrp4LcaPuLY2PzUfqM/w9N23quVwhKt5Qm8=
 modernc.org/opt v0.1.4/go.mod h1:03fq9lsNfvkYSfxrfUhZCWPk1lm4cq4N+Bh//bEtgns=
 modernc.org/sortutil v1.2.1 h1:+xyoGf15mM3NMlPDnFqrteY07klSFxLElE2PVuWIJ7w=
 modernc.org/sortutil v1.2.1/go.mod h1:7ZI3a3REbai7gzCLcotuw9AC4VZVpYMjDzETGsSMqJE=
-modernc.org/sqlite v1.39.0 h1:6bwu9Ooim0yVYA7IZn9demiQk/Ejp0BtTjBWFLymSeY=
-modernc.org/sqlite v1.39.0/go.mod h1:cPTJYSlgg3Sfg046yBShXENNtPrWrDX8bsbAQBzgQ5E=
+modernc.org/sqlite v1.46.1 h1:eFJ2ShBLIEnUWlLy12raN0Z1plqmFX9Qe3rjQTKt6sU=
+modernc.org/sqlite v1.46.1/go.mod h1:CzbrU2lSB1DKUusvwGz7rqEKIq+NUd8GWuBBZDs9/nA=
 modernc.org/strutil v1.2.1 h1:UneZBkQA+DX2Rp35KcM69cSsNES9ly8mQWD71HKlOA0=
 modernc.org/strutil v1.2.1/go.mod h1:EHkiggD70koQxjVdSBM3JKM7k6L0FbGE5eymy9i3B9A=
 modernc.org/token v1.1.0 h1:Xl7Ap9dKaEs5kLoOQeQmPWevfnk/DM5qcLcYlA8ys6Y=

install.sh

@@ -15,7 +15,7 @@ done
 OS=
 case "$(uname -s)" in
 Linux) OS="linux" ;;
-Darwin) OS="Darwin" ;;
+Darwin) OS="darwin" ;;
 *)
     echo "OS not supported."
     exit 2

internal/htmlcheck/caniemail-data.json

@@ -1,6 +1,6 @@
 {
 	"api_version":"1.0.4",
-	"last_update_date":"2025-09-09 18:08:06 +0000",
+	"last_update_date":"2026-02-16 15:39:06 +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":[
 		{
@@ -270,7 +270,7 @@
 			"last_test_date":"2024-01-17",
 			"test_url":"https://www.caniemail.com/tests/css-backdrop-filter.html",
 			"test_results_url":"https://testi.at/proj/p4r7t9n30o7nh7vvfpn",
-			"stats":{"apple-mail":{"macos":{"10":"y #1","11":"u","12":"u","13":"y #1"},"ios":{"11":"n","12":"n","13":"y #1","14":"y #1","15":"y #1"}},"gmail":{"desktop-webmail":{"2024-01":"n"},"ios":{"2024-01":"n"},"android":{"2024-01":"n"},"mobile-webmail":{"2024-01":"n"}},"orange":{"desktop-webmail":{"2024-01":"u"},"ios":{"2024-01":"n"},"android":{"2024-01":"u"}},"outlook":{"windows":{"2013":"n","2016":"n","2019":"n","2021":"n"},"windows-mail":{"2024-01":"n"},"macos":{"2024-01":"y"},"outlook-com":{"2024-01":"n"},"ios":{"2024-01":"n"},"android":{"2024-01":"n"}},"yahoo":{"desktop-webmail":{"2024-01":"n"},"ios":{"2024-01":"n"},"android":{"2024-01":"n"}},"aol":{"desktop-webmail":{"2024-01":"n"},"ios":{"2024-01":"n"},"android":{"2024-01":"n"}},"samsung-email":{"android":{"2024-01":"y"}},"sfr":{"desktop-webmail":{"2024-03":"y"},"ios":{"2024-03":"y"},"android":{"2024-03":"y"}},"thunderbird":{"macos":{"2024-01":"u"}},"protonmail":{"desktop-webmail":{"2024-01":"u"},"ios":{"2024-01":"u"},"android":{"2024-01":"u"}},"hey":{"desktop-webmail":{"2024-01":"u"}},"mail-ru":{"desktop-webmail":{"2024-01":"y"}},"fastmail":{"desktop-webmail":{"2024-01":"u"}},"laposte":{"desktop-webmail":{"2024-01":"u"}},"gmx":{"desktop-webmail":{"2024-01":"n"},"ios":{"2024-01":"u"},"android":{"2024-01":"u"}},"web-de":{"desktop-webmail":{"2024-01":"n"},"ios":{"2024-01":"u"},"android":{"2024-01":"u"}},"ionos-1and1":{"desktop-webmail":{"2024-01":"u"},"android":{"2024-01":"u"}}},
+			"stats":{"apple-mail":{"macos":{"10":"y #1","11":"u","12":"u","13":"y #1"},"ios":{"11":"n","12":"n","13":"y #1","14":"y #1","15":"y #1"}},"gmail":{"desktop-webmail":{"2024-01":"n"},"ios":{"2024-01":"n"},"android":{"2024-01":"n"},"mobile-webmail":{"2024-01":"n"}},"orange":{"desktop-webmail":{"2024-01":"u"},"ios":{"2024-01":"n"},"android":{"2024-01":"u"}},"outlook":{"windows":{"2013":"n","2016":"n","2019":"n","2021":"n"},"windows-mail":{"2024-01":"n"},"macos":{"2024-01":"y"},"outlook-com":{"2024-01":"n"},"ios":{"2024-01":"n"},"android":{"2024-01":"n"}},"yahoo":{"desktop-webmail":{"2024-01":"n"},"ios":{"2024-01":"n"},"android":{"2024-01":"n"}},"aol":{"desktop-webmail":{"2024-01":"n"},"ios":{"2024-01":"n"},"android":{"2024-01":"n"}},"samsung-email":{"android":{"2024-01":"y"}},"sfr":{"desktop-webmail":{"2024-03":"y"},"ios":{"2024-03":"y"},"android":{"2024-03":"y"}},"thunderbird":{"macos":{"2024-01":"u"}},"protonmail":{"desktop-webmail":{"2024-01":"y"},"ios":{"2024-01":"y"},"android":{"2024-01":"y"}},"hey":{"desktop-webmail":{"2024-01":"u"}},"mail-ru":{"desktop-webmail":{"2024-01":"y"}},"fastmail":{"desktop-webmail":{"2024-01":"u"}},"laposte":{"desktop-webmail":{"2024-01":"u"}},"gmx":{"desktop-webmail":{"2024-01":"n"},"ios":{"2024-01":"u"},"android":{"2024-01":"u"}},"web-de":{"desktop-webmail":{"2024-01":"n"},"ios":{"2024-01":"u"},"android":{"2024-01":"u"}},"ionos-1and1":{"desktop-webmail":{"2024-01":"u"},"android":{"2024-01":"u"}}},
 			"notes":null,
 			"notes_by_num":{"1":"Works with prefix `-webkit`"}
 		},
@@ -446,7 +446,7 @@
 			"last_test_date":"2023-12-20",
 			"test_url":"https://www.caniemail.com/tests/css-border-collapse.html",
 			"test_results_url":"https://testi.at/proj/4zk4fe7tv86fn4bc6",
-			"stats":{"apple-mail":{"macos":{"2023-12":"y"},"ios":{"2023-12":"y"}},"gmail":{"desktop-webmail":{"2023-12":"y"},"ios":{"2023-12":"y"},"android":{"2023-12":"y"},"mobile-webmail":{"2023-12":"y"}},"orange":{"desktop-webmail":{"2023-12":"u"},"ios":{"2023-12":"u"},"android":{"2023-12":"u"}},"outlook":{"windows":{"2023-12":"y"},"windows-mail":{"2023-12":"y"},"macos":{"2023-12":"y"},"outlook-com":{"2023-12":"y"},"ios":{"2023-12":"y"},"android":{"2023-12":"y"}},"yahoo":{"desktop-webmail":{"2023-12":"y"},"ios":{"2023-12":"y"},"android":{"2023-12":"y"}},"aol":{"desktop-webmail":{"2023-12":"y"},"ios":{"2023-12":"y"},"android":{"2023-12":"y"}},"samsung-email":{"android":{"2023-12":"y"}},"sfr":{"desktop-webmail":{"2024-03":"y"},"ios":{"2024-03":"y"},"android":{"2024-03":"y"}},"thunderbird":{"macos":{"2023-12":"y"}},"protonmail":{"desktop-webmail":{"2023-12":"u"},"ios":{"2023-12":"u"},"android":{"2023-12":"u"}},"hey":{"desktop-webmail":{"2023-12":"u"}},"mail-ru":{"desktop-webmail":{"2023-12":"y"}},"fastmail":{"desktop-webmail":{"2023-12":"u"}},"laposte":{"desktop-webmail":{"2023-12":"u"}},"gmx":{"desktop-webmail":{"2023-12":"y"},"ios":{"2023-12":"u"},"android":{"2023-12":"u"}},"web-de":{"desktop-webmail":{"2023-12":"y"},"ios":{"2023-12":"u"},"android":{"2023-12":"u"}},"ionos-1and1":{"desktop-webmail":{"2023-12":"u"},"android":{"2023-12":"u"}}},
+			"stats":{"apple-mail":{"macos":{"2023-12":"y"},"ios":{"2023-12":"y"}},"gmail":{"desktop-webmail":{"2023-12":"y"},"ios":{"2023-12":"y"},"android":{"2023-12":"y"},"mobile-webmail":{"2023-12":"y"}},"orange":{"desktop-webmail":{"2023-12":"u"},"ios":{"2023-12":"u"},"android":{"2023-12":"u"}},"outlook":{"windows":{"2023-12":"y"},"windows-mail":{"2023-12":"y"},"macos":{"2023-12":"y"},"outlook-com":{"2023-12":"y"},"ios":{"2023-12":"y"},"android":{"2023-12":"y"}},"yahoo":{"desktop-webmail":{"2023-12":"y"},"ios":{"2023-12":"y"},"android":{"2023-12":"y"}},"aol":{"desktop-webmail":{"2023-12":"y"},"ios":{"2023-12":"y"},"android":{"2023-12":"y"}},"samsung-email":{"android":{"2023-12":"y"}},"sfr":{"desktop-webmail":{"2024-03":"y"},"ios":{"2024-03":"y"},"android":{"2024-03":"y"}},"thunderbird":{"macos":{"2023-12":"y"}},"protonmail":{"desktop-webmail":{"2023-12":"y"},"ios":{"2023-12":"y"},"android":{"2023-12":"y"}},"hey":{"desktop-webmail":{"2023-12":"u"}},"mail-ru":{"desktop-webmail":{"2023-12":"y"}},"fastmail":{"desktop-webmail":{"2023-12":"u"}},"laposte":{"desktop-webmail":{"2023-12":"u"}},"gmx":{"desktop-webmail":{"2023-12":"y"},"ios":{"2023-12":"u"},"android":{"2023-12":"u"}},"web-de":{"desktop-webmail":{"2023-12":"y"},"ios":{"2023-12":"u"},"android":{"2023-12":"u"}},"ionos-1and1":{"desktop-webmail":{"2023-12":"u"},"android":{"2023-12":"u"}}},
 			"notes":null,
 			"notes_by_num":null
 		},
@@ -558,7 +558,7 @@
 			"last_test_date":"2023-12-20",
 			"test_url":"https://www.caniemail.com/tests/css-border-spacing.html",
 			"test_results_url":"https://testi.at/proj/dyodfk8c5dhjanflz",
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 			"category":"css",
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 			"keywords":"dark mode, light mode",
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-			"notes_by_num":{"1":"Partial. Not supported with non Google accounts."}
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 			"description":"Enables setting two colors (one for light and the other for dark mode) for a property.",
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 			"keywords":"dark, light",
 			"last_test_date":"2024-08-14",
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-			"notes_by_num":{"1":"Partial. Not supported with non Google accounts."}
+			"notes_by_num":{"1":"Partial. Not supported with non Google accounts.","2":"Partial. Not supported with Microsoft accounts."}
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@@ -1118,7 +1118,7 @@
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 			"test_url":"https://www.caniemail.com/tests/css-hyphenate-character.html",
 			"test_results_url":"https://testi.at/proj/vr3e1e5bikda08oxc2",
-			"stats":{"apple-mail":{"macos":{"20":"n","21":"n","22":"n","23":"y"},"ios":{"11":"n","12":"n","13":"n","14":"n","15":"y"}},"gmail":{"desktop-webmail":{"2024-06":"n"},"ios":{"2024-06":"n"},"android":{"2024-06":"n"},"mobile-webmail":{"2024-06":"n"}},"orange":{"desktop-webmail":{"2024-06":"u"},"ios":{"2024-06":"u"},"android":{"2024-06":"u"}},"outlook":{"windows":{"2013":"n","2016":"n","2019":"n","2021":"n"},"windows-mail":{"2024-06":"n"},"macos":{"2024-06":"n"},"outlook-com":{"2024-06":"n"},"ios":{"2024-06":"n"},"android":{"2024-06":"n"}},"yahoo":{"desktop-webmail":{"2024-06":"n"},"ios":{"2024-06":"n"},"android":{"2024-06":"n"}},"aol":{"desktop-webmail":{"2024-06":"n"},"ios":{"2024-06":"n"},"android":{"2024-06":"n"}},"samsung-email":{"android":{"2024-06":"y"}},"sfr":{"desktop-webmail":{"2024-03":"u"},"ios":{"2024-03":"u"},"android":{"2024-03":"u"}},"protonmail":{"desktop-webmail":{"2024-06":"u"},"ios":{"2024-06":"u"},"android":{"2024-06":"u"}},"hey":{"desktop-webmail":{"2024-06":"u"}},"mail-ru":{"desktop-webmail":{"2024-06":"a #1"}},"fastmail":{"desktop-webmail":{"2024-06":"u"}},"laposte":{"desktop-webmail":{"2024-06":"u"}},"gmx":{"desktop-webmail":{"2024-06":"n"},"ios":{"2024-06":"u"},"android":{"2024-06":"u"}},"web-de":{"desktop-webmail":{"2024-06":"n"},"ios":{"2024-06":"u"},"android":{"2024-06":"u"}},"ionos-1and1":{"desktop-webmail":{"2024-06":"u"},"android":{"2024-06":"u"}}},
+			"stats":{"apple-mail":{"macos":{"20":"n","21":"n","22":"n","23":"y"},"ios":{"11":"n","12":"n","13":"n","14":"n","15":"y"}},"gmail":{"desktop-webmail":{"2024-06":"n"},"ios":{"2024-06":"n"},"android":{"2024-06":"n"},"mobile-webmail":{"2024-06":"n"}},"orange":{"desktop-webmail":{"2024-06":"u"},"ios":{"2024-06":"u"},"android":{"2024-06":"u"}},"outlook":{"windows":{"2013":"n","2016":"n","2019":"n","2021":"n"},"windows-mail":{"2024-06":"n"},"macos":{"2024-06":"n"},"outlook-com":{"2024-06":"n"},"ios":{"2024-06":"n"},"android":{"2024-06":"n"}},"yahoo":{"desktop-webmail":{"2024-06":"n"},"ios":{"2024-06":"n"},"android":{"2024-06":"n"}},"aol":{"desktop-webmail":{"2024-06":"n"},"ios":{"2024-06":"n"},"android":{"2024-06":"n"}},"samsung-email":{"android":{"2024-06":"y"}},"sfr":{"desktop-webmail":{"2024-03":"u"},"ios":{"2024-03":"u"},"android":{"2024-03":"u"}},"protonmail":{"desktop-webmail":{"2024-06":"y"},"ios":{"2024-06":"y"},"android":{"2024-06":"y"}},"hey":{"desktop-webmail":{"2024-06":"u"}},"mail-ru":{"desktop-webmail":{"2024-06":"a #1"}},"fastmail":{"desktop-webmail":{"2024-06":"u"}},"laposte":{"desktop-webmail":{"2024-06":"u"}},"gmx":{"desktop-webmail":{"2024-06":"n"},"ios":{"2024-06":"u"},"android":{"2024-06":"u"}},"web-de":{"desktop-webmail":{"2024-06":"n"},"ios":{"2024-06":"u"},"android":{"2024-06":"u"}},"ionos-1and1":{"desktop-webmail":{"2024-06":"u"},"android":{"2024-06":"u"}}},
 			"notes":null,
 			"notes_by_num":{"1":"Partial. Does not support encoded character values"}
 		},
@@ -1177,7 +1177,7 @@
 			"description":"",
 			"url":"https://www.caniemail.com/features/css-inline-size/",
 			"category":"css",
-			"tags":[],
+			"tags":["i18n"],
 			"keywords":null,
 			"last_test_date":"2019-02-28",
 			"test_url":"https://www.caniemail.com/tests/css-box-model.html",
@@ -1353,7 +1353,7 @@
 			"description":null,
 			"url":"https://www.caniemail.com/features/css-list-style/",
 			"category":"css",
-			"tags":[],
+			"tags":["i18n"],
 			"keywords":null,
 			"last_test_date":"2020-04-20",
 			"test_url":"https://www.caniemail.com/tests/css-list.html",
@@ -1502,7 +1502,7 @@
 			"last_test_date":"2019-08-02",
 			"test_url":"https://www.caniemail.com/tests/css-width-height.html",
 			"test_results_url":"https://app.emailonacid.com/app/acidtest/dP8XNPcCLZGrogYGvFgCRRjJJO2nTWxchQ0WZSu0Pxcyb/list",
-			"stats":{"apple-mail":{"macos":{"10.3":"y"},"ios":{"5.1":"a #2","6.1":"a #2","10.3":"y","12.2":"y"}},"gmail":{"desktop-webmail":{"2019-08":"y"},"ios":{"2019-08":"y"},"android":{"2019-08":"y"},"mobile-webmail":{"2020-02":"y"}},"orange":{"desktop-webmail":{"2019-08":"y","2021-03":"y"},"ios":{"2019-08":"y"},"android":{"2019-08":"y"}},"outlook":{"windows":{"2003":"a #2","2007":"n","2010":"n","2013":"n","2016":"n","2019":"a #1"},"windows-mail":{"2020-01":"a #1"},"macos":{"2011":"y","2016":"y","16.80":"y"},"outlook-com":{"2019-08":"y","2024-01":"y"},"ios":{"2019-08":"y"},"android":{"2019-08":"y"}},"samsung-email":{"android":{"6.0":"y"}},"sfr":{"desktop-webmail":{"2019-08":"y"},"ios":{"2019-08":"y"},"android":{"2019-08":"y"}},"thunderbird":{"macos":{"60.7":"y"}},"aol":{"desktop-webmail":{"2020-01":"y"},"ios":{"2020-01":"a #2"},"android":{"2020-01":"y"}},"yahoo":{"desktop-webmail":{"2019-08":"y"},"ios":{"2019-08":"a #2"},"android":{"2019-08":"y"}},"protonmail":{"desktop-webmail":{"2020-03":"y"},"ios":{"2020-03":"a #2"},"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":{"10.3":"y"},"ios":{"5.1":"a #2","6.1":"a #2","10.3":"y","12.2":"y"}},"gmail":{"desktop-webmail":{"2019-08":"y"},"ios":{"2019-08":"y"},"android":{"2019-08":"y"},"mobile-webmail":{"2020-02":"y"}},"orange":{"desktop-webmail":{"2019-08":"y","2021-03":"y"},"ios":{"2019-08":"y"},"android":{"2019-08":"y"}},"outlook":{"windows":{"2003":"a #2","2007":"n","2010":"n","2013":"n","2016":"n","2019":"a #1"},"windows-mail":{"2020-01":"a #1"},"macos":{"2011":"y","2016":"y","16.80":"y"},"outlook-com":{"2019-08":"y","2024-01":"y"},"ios":{"2019-08":"y"},"android":{"2019-08":"y"}},"samsung-email":{"android":{"6.0":"y"}},"sfr":{"desktop-webmail":{"2019-08":"y"},"ios":{"2019-08":"y"},"android":{"2019-08":"y"}},"thunderbird":{"macos":{"60.7":"y"}},"aol":{"desktop-webmail":{"2020-01":"y"},"ios":{"2020-01":"a #2","2025-11":"y"},"android":{"2020-01":"y"}},"yahoo":{"desktop-webmail":{"2019-08":"y"},"ios":{"2019-08":"a #2","2025-11":"y"},"android":{"2019-08":"y"}},"protonmail":{"desktop-webmail":{"2020-03":"y"},"ios":{"2020-03":"a #2","2025-11":"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":"Partial. Only works on `<table>` elements.","2":"Partial. Doesn't work on `<table>` elements, as per [CSS 2.1 specification](https://www.w3.org/TR/CSS2/visudet.html#min-max-widths)."}
 		},
@@ -1614,9 +1614,9 @@
 			"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","137.0b3":"y"}},"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"}}},
+			"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","137.0b3":"y"}},"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":"y"},"ios":{"2023-08":"a #5"},"android":{"2023-08":"a #5"}},"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"}}},
 			"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."}
+			"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.","5":"Partial. `@media` is not fully supported, and `& & &` syntax not supported"}
 		},
 	
 		{
@@ -1678,7 +1678,7 @@
 			"last_test_date":"2024-06-13",
 			"test_url":"https://www.caniemail.com/tests/css-widows.html",
 			"test_results_url":"https://testi.at/proj/6vd8udzx1b5l1vrnsr",
-			"stats":{"apple-mail":{"macos":{"2024-05":"y"},"ios":{"2024-05":"y"}},"gmail":{"desktop-webmail":{"2024-05":"n #4"},"ios":{"2024-05":"n"},"android":{"2024-05":"n #3"},"mobile-webmail":{"2024-05":"n #1 #2"}},"orange":{"desktop-webmail":{"2024-05":"u"},"ios":{"2024-05":"u"},"android":{"2024-05":"u"}},"outlook":{"windows":{"2013":"n","2016":"n","2019":"n","2021":"n"},"windows-mail":{"2024-05":"n"},"macos":{"2024-05":"y"},"outlook-com":{"2024-05":"y"},"ios":{"2024-05":"y"},"android":{"2024-05":"y"}},"yahoo":{"desktop-webmail":{"2024-05":"n"},"ios":{"2024-05":"n"},"android":{"2024-05":"n"}},"aol":{"desktop-webmail":{"2024-05":"n"},"ios":{"2024-05":"n"},"android":{"2024-05":"n"}},"samsung-email":{"android":{"2024-05":"y"}},"sfr":{"desktop-webmail":{"2024-05":"u"},"ios":{"2024-05":"u"},"android":{"2024-05":"u"}},"protonmail":{"desktop-webmail":{"2024-05":"u"},"ios":{"2024-05":"u"},"android":{"2024-05":"u"}},"hey":{"desktop-webmail":{"2024-05":"u"}},"mail-ru":{"desktop-webmail":{"2024-05":"y #4"}},"fastmail":{"desktop-webmail":{"2024-05":"u"}},"laposte":{"desktop-webmail":{"2021-08":"u"}},"gmx":{"desktop-webmail":{"2024-05":"n #1 #4"},"ios":{"2024-05":"u"},"android":{"2024-05":"u"}},"web-de":{"desktop-webmail":{"2024-05":"n #1 #4"},"ios":{"2024-05":"u"},"android":{"2024-05":"u"}},"ionos-1and1":{"desktop-webmail":{"2024-05":"u"},"android":{"2024-05":"u"}}},
+			"stats":{"apple-mail":{"macos":{"2024-05":"y"},"ios":{"2024-05":"y"}},"gmail":{"desktop-webmail":{"2024-05":"n #4"},"ios":{"2024-05":"n"},"android":{"2024-05":"n #3"},"mobile-webmail":{"2024-05":"n #1 #2"}},"orange":{"desktop-webmail":{"2024-05":"u"},"ios":{"2024-05":"u"},"android":{"2024-05":"u"}},"outlook":{"windows":{"2013":"n","2016":"n","2019":"n","2021":"n"},"windows-mail":{"2024-05":"n"},"macos":{"2024-05":"y"},"outlook-com":{"2024-05":"y"},"ios":{"2024-05":"y"},"android":{"2024-05":"y"}},"yahoo":{"desktop-webmail":{"2024-05":"n"},"ios":{"2024-05":"n"},"android":{"2024-05":"n"}},"aol":{"desktop-webmail":{"2024-05":"n"},"ios":{"2024-05":"n"},"android":{"2024-05":"n"}},"samsung-email":{"android":{"2024-05":"y"}},"sfr":{"desktop-webmail":{"2024-05":"u"},"ios":{"2024-05":"u"},"android":{"2024-05":"u"}},"protonmail":{"desktop-webmail":{"2024-05":"y #4"},"ios":{"2024-05":"y #4"},"android":{"2024-05":"y #4"}},"hey":{"desktop-webmail":{"2024-05":"u"}},"mail-ru":{"desktop-webmail":{"2024-05":"y #4"}},"fastmail":{"desktop-webmail":{"2024-05":"u"}},"laposte":{"desktop-webmail":{"2021-08":"u"}},"gmx":{"desktop-webmail":{"2024-05":"n #1 #4"},"ios":{"2024-05":"u"},"android":{"2024-05":"u"}},"web-de":{"desktop-webmail":{"2024-05":"n #1 #4"},"ios":{"2024-05":"u"},"android":{"2024-05":"u"}},"ionos-1and1":{"desktop-webmail":{"2024-05":"u"},"android":{"2024-05":"u"}}},
 			"notes":null,
 			"notes_by_num":{"1":"Buggy. `columns` property is stripped which is required for `orphans` to work","2":"Buggy. `orphans` property value is replaced by `auto`","3":"Not supported, but Gmail's default styles on the email message container includes the `orphans` property. These values are inherited by children elements","4":"Webmail rendering depends on browser support"}
 		},
@@ -1859,6 +1859,22 @@
 			"notes_by_num":{"1":"Partial. Only supported on type selectors.","2":"Not supported. `<input>` elements are transformed into `<noinput>`."}
 		},
 	
+		{
+			"slug":"css-pseudo-class-default",
+			"title":":default",
+			"description":"Selects form elements that are the default in a group of related elements.",
+			"url":"https://www.caniemail.com/features/css-pseudo-class-default/",
+			"category":"css",
+			"tags":["accessibility"],
+			"keywords":"pseudo-class, form",
+			"last_test_date":"2026-02-05",
+			"test_url":"https://www.caniemail.com/tests/css-pseudo-class-default.html",
+			"test_results_url":"https://testi.at/proj/7ov4sbxz1krv07gkf5",
+			"stats":{"apple-mail":{"macos":{"12":"y","26":"y"},"ios":{"11":"y","26":"y"}},"gmail":{"desktop-webmail":{"2026-02":"n"},"ios":{"2026-02":"n"},"android":{"2026-02":"n"},"mobile-webmail":{"2026-02":"n"}},"orange":{"desktop-webmail":{"2026-02":"u"},"ios":{"2026-02":"u"},"android":{"2026-02":"u"}},"outlook":{"windows":{"2007":"n","2010":"n","2013":"n","2016":"n","2019":"n","2024":"n"},"windows-mail":{"2026-02":"n"},"macos":{"16.105.2":"y"},"outlook-com":{"2026-02":"a #1"},"ios":{"2026-02":"y"},"android":{"2026-02":"y"}},"samsung-email":{"android":{"6.0":"u"}},"sfr":{"desktop-webmail":{"2026-02":"u"},"ios":{"2026-02":"u"},"android":{"2026-02":"u"}},"thunderbird":{"macos":{"147.0.1":"y"}},"aol":{"desktop-webmail":{"2026-02":"y"},"ios":{"2026-02":"y"},"android":{"2026-02":"y"}},"yahoo":{"desktop-webmail":{"2026-02":"y"},"ios":{"2026-02":"y"},"android":{"2026-02":"y"}},"protonmail":{"desktop-webmail":{"2026-02":"n"},"ios":{"2026-02":"n"},"android":{"2026-02":"n"}},"hey":{"desktop-webmail":{"2026-02":"u"}},"mail-ru":{"desktop-webmail":{"2026-02":"y"}},"fastmail":{"desktop-webmail":{"2026-02":"u"}},"laposte":{"desktop-webmail":{"2026-02":"u"}},"free-fr":{"desktop-webmail":{"2026-02":"u"}},"t-online-de":{"desktop-webmail":{"2026-02":"n"}},"gmx":{"desktop-webmail":{"2026-02":"n"},"ios":{"2026-02":"y"},"android":{"2026-02":"n"}},"web-de":{"desktop-webmail":{"2026-02":"n"},"ios":{"2026-02":"u"},"android":{"2026-02":"u"}},"ionos-1and1":{"desktop-webmail":{"2026-02":"u"},"android":{"2026-02":"u"}}},
+			"notes":"Depends on device/browser support. Some devices/browsers do not support styling on &lt;option&gt;.",
+			"notes_by_num":{"1":"Works on input[radio] and input[checkbox] only."}
+		},
+	
 		{
 			"slug":"css-pseudo-class-first-child",
 			"title":":first-child",
@@ -2558,7 +2574,7 @@
 			"last_test_date":"2022-07-21",
 			"test_url":"https://www.caniemail.com/tests/css-tab-size.html",
 			"test_results_url":"https://testi.at/proj/Rk9H1m9ubAYH1DwUqZu8G",
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 			"notes_by_num":{"1":"Not supported. All tables are forced to `table-layout:fixed`."}
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@@ -2585,12 +2601,12 @@
 			"description":"The `text-align-last` CSS property sets how the last line of a block or a line right before a forced line break is aligned.",
 			"url":"https://www.caniemail.com/features/css-text-align-last/",
 			"category":"css",
-			"tags":[],
+			"tags":["i18n"],
 			"keywords":"align, align-last",
 			"last_test_date":"2022-08-31",
 			"test_url":"https://www.caniemail.com/tests/css-text-align-last.html",
 			"test_results_url":"https://app.emailonacid.com/app/acidtest/LxplTmJT9Ilq9GUyn8Aq8MVK6EO427qmx1Ic4A7jc7bOJ/list",
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 			"description":"Sets the horizontal alignment of the content.",
 			"url":"https://www.caniemail.com/features/css-text-align/",
 			"category":"css",
-			"tags":[],
+			"tags":["i18n"],
 			"keywords":"align",
 			"last_test_date":"2021-09-24",
 			"test_url":"https://www.caniemail.com/tests/css-text-align.html",
@@ -2670,7 +2686,7 @@
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 			"test_url":"https://www.caniemail.com/tests/css-text-decoration-style.html",
 			"test_results_url":"https://testi.at/proj/jalr04oy0yrxfd7kuo",
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 			"notes":null,
 			"notes_by_num":null
 		},
@@ -2697,7 +2713,7 @@
 			"description":"Tested with the values `overline`, `underline` and `line-through`.",
 			"url":"https://www.caniemail.com/features/css-text-decoration/",
 			"category":"css",
-			"tags":[],
+			"tags":["i18n"],
 			"keywords":"underline",
 			"last_test_date":"2019-02-28",
 			"test_url":"https://www.caniemail.com/tests/css-text-decoration.html",
@@ -2825,7 +2841,7 @@
 			"description":"Each of the six `text-transform` values defined by MDN (`capitalize`, `uppercase`, `lowercase`, `none`, `full-width`, `full-size-kana`).",
 			"url":"https://www.caniemail.com/features/css-text-transform/",
 			"category":"css",
-			"tags":[],
+			"tags":["i18n"],
 			"keywords":null,
 			"last_test_date":"2021-09-19",
 			"test_url":"https://www.caniemail.com/tests/css-text-transform.html",
@@ -3198,9 +3214,9 @@
 			"last_test_date":"2024-02-14",
 			"test_url":"https://www.caniemail.com/tests/css-user-select.html",
 			"test_results_url":"https://testi.at/proj/9zjptajgcxyzc74ockp",
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 			"notes":null,
-			"notes_by_num":{"1":"Works with `-webkit` prefix","2":"`all` value does not work","3":"Property is stripped from style tag"}
+			"notes_by_num":{"1":"Works with `-webkit` prefix","2":"`all` value does not work","3":"Property is stripped from style tag","4":"`none` value does not work, client allow to select text anyway"}
 		},
 	
 		{
@@ -3262,7 +3278,7 @@
 			"last_test_date":"2024-09-04",
 			"test_url":"https://www.caniemail.com/tests/css-white-space-collapse.html",
 			"test_results_url":"https://testi.at/proj/e6y4s3zytp5kty7kcg",
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 			"notes":null,
 			"notes_by_num":{"1":"Partial. `preserve-spaces` value works only on Firefox."}
 		},
@@ -3294,7 +3310,7 @@
 			"last_test_date":"2024-05-03",
 			"test_url":"https://www.caniemail.com/tests/css-widows.html",
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 			"notes_by_num":{"1":"Buggy. `columns` property is stripped which is required for `widows` to work","2":"Buggy. `widows` property value is replaced by `auto`","3":"Not supported, but Gmail's default styles on the email message container includes the `widows` property. These values are inherited by children elements","4":"Webmail rendering depends on browser support"}
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 			"notes":null,
 			"notes_by_num":{"1":"Buggy. `title` attribute is removed but keeps `<acronym>` tag."}
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 			"description":null,
 			"url":"https://www.caniemail.com/features/html-blockquote/",
 			"category":"html",
-			"tags":[],
+			"tags":["accessibility"],
 			"keywords":null,
 			"last_test_date":"2020-05-08",
 			"test_url":"https://www.caniemail.com/tests/html-semantics.html",
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 			"description":"It is used to identify a term that is going to be described within the content.",
 			"url":"https://www.caniemail.com/features/html-dfn/",
 			"category":"html",
-			"tags":[],
+			"tags":["accessibility"],
 			"keywords":null,
 			"last_test_date":"2023-09-11",
 			"test_url":"https://www.caniemail.com/tests/html-dfn.html",
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 			"description":"Support for headings elements in HTML: `<h1>`, `<h2>`, `<h3>`, `<h4>`, `<h5>`, `<h6>`.",
 			"url":"https://www.caniemail.com/features/html-h1-h6/",
 			"category":"html",
-			"tags":[],
+			"tags":["accessibility"],
 			"keywords":"headings, h1, h2, h3, h4, h5, h6",
 			"last_test_date":"2020-05-08",
 			"test_url":"https://www.caniemail.com/tests/html-semantics.html",
@@ -4089,7 +4105,7 @@
 			"description":"Support for lists in HTML: `<ul>`, `<ol>`, `<li>`, `<dl>`, `<dt>` and `<dd>` elements.",
 			"url":"https://www.caniemail.com/features/html-lists/",
 			"category":"html",
-			"tags":[],
+			"tags":["accessibility"],
 			"keywords":"ul, ol, li, dl, dt, dd",
 			"last_test_date":"2024-02-17",
 			"test_url":"https://www.caniemail.com/tests/css-list.html",
@@ -4153,7 +4169,7 @@
 			"description":"Changes the default colors of HTML elements. Useful for when you want an email to display only in a dark color scheme or only a light scheme, regardless of user settings. Equivalent to setting the color-scheme CSS property on the root element",
 			"url":"https://www.caniemail.com/features/html-meta-color-scheme/",
 			"category":"html",
-			"tags":[],
+			"tags":["accessibility"],
 			"keywords":"dark-mode",
 			"last_test_date":"2023-09-18",
 			"test_url":"https://www.caniemail.com/tests/html-meta-color-scheme.html",
@@ -4201,7 +4217,7 @@
 			"description":null,
 			"url":"https://www.caniemail.com/features/html-p/",
 			"category":"html",
-			"tags":[],
+			"tags":["accessibility"],
 			"keywords":"paragraph",
 			"last_test_date":"2020-05-08",
 			"test_url":"https://www.caniemail.com/tests/html-semantics.html",
@@ -4345,7 +4361,7 @@
 			"description":"",
 			"url":"https://www.caniemail.com/features/html-ruby/",
 			"category":"html",
-			"tags":["i18n"],
+			"tags":["i18n","accessibility"],
 			"keywords":null,
 			"last_test_date":"2019-02-28",
 			"test_url":"https://www.caniemail.com/tests/HTML5.html",
@@ -4377,7 +4393,7 @@
 			"description":"This includes support for `<article>`, `<aside>`, `<details>`, `<figcaption>`, `<figure>`, `<footer>`, `<header>`, `<main>`, `<mark>`, `<nav>`, `<section>`, `<summary>`, `<time>` elements.",
 			"url":"https://www.caniemail.com/features/html-semantics/",
 			"category":"html",
-			"tags":[],
+			"tags":["accessibility"],
 			"keywords":"article, aside, details, figcaption, figure, footer, header, main, mark, nav, section, summary, time",
 			"last_test_date":"2019-07-29",
 			"test_url":"https://www.caniemail.com/tests/html-semantics.html",
@@ -4478,9 +4494,9 @@
 			"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/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"},"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"}}},
+			"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)"}
 		},
 	
 		{
@@ -4505,7 +4521,7 @@
 			"description":null,
 			"url":"https://www.caniemail.com/features/html-table/",
 			"category":"html",
-			"tags":[],
+			"tags":["accessibility"],
 			"keywords":null,
 			"last_test_date":"2019-09-15",
 			"test_url":"https://www.caniemail.com/tests/html-table.html",

internal/htmlcheck/css.go

@@ -1,8 +1,11 @@
 package htmlcheck
 
 import (
+	"context"
+	"errors"
 	"fmt"
 	"io"
+	"net"
 	"net/http"
 	"net/url"
 	"strings"
@@ -141,19 +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
 				}
 
@@ -182,14 +186,20 @@ 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,
+// 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
 	}
 
+	req.Header.Set("User-Agent", "Mailpit HTML Checker/"+config.Version)
+
 	// Get the link response data
-	resp, err := client.Get(url)
+	resp, err := client.Do(req)
 	if err != nil {
 		return nil, err
 	}
@@ -200,7 +210,17 @@ func downloadToBytes(url string) ([]byte, error) {
 		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
 	}
@@ -208,10 +228,12 @@ 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
@@ -249,3 +271,40 @@ func testInlineStyles(doc *goquery.Document) map[string]int {
 
 	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/main.go

@@ -163,9 +163,9 @@ func (c CanIEmail) getTest(k string) (Warning, error) {
 					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/status.go

@@ -1,14 +1,20 @@
 package linkcheck
 
 import (
+	"context"
 	"crypto/tls"
+	"errors"
+	"fmt"
+	"net"
 	"net/http"
 	"regexp"
+	"strings"
 	"sync"
 	"time"
 
 	"github.com/axllent/mailpit/config"
 	"github.com/axllent/mailpit/internal/logger"
+	"github.com/axllent/mailpit/internal/tools"
 )
 
 func getHTTPStatuses(links []string, followRedirects bool) []Link {
@@ -34,6 +40,10 @@ func getHTTPStatuses(links []string, followRedirects bool) []Link {
 			if err != nil {
 				l.StatusCode = 0
 				l.Status = httpErrorSummary(err)
+				if strings.Contains(l.Status, "private/reserved address") {
+					l.Status = "Blocked private/reserved address"
+					l.StatusCode = 451
+				}
 			} else {
 				l.StatusCode = code
 				l.Status = http.StatusText(code)
@@ -57,23 +67,37 @@ func getHTTPStatuses(links []string, followRedirects bool) []Link {
 
 // Do a HEAD request to return HTTP status code
 func doHead(link string, followRedirects bool) (int, error) {
+	if !tools.IsValidLinkURL(link) {
+		return 0, fmt.Errorf("invalid URL: %s", link)
+	}
 
-	timeout := time.Duration(10 * time.Second)
+	dialer := &net.Dialer{
+		Timeout:   10 * time.Second,
+		KeepAlive: 30 * time.Second,
+	}
 
-	tr := &http.Transport{}
+	tr := &http.Transport{
+		DialContext: safeDialContext(dialer),
+	}
 
 	if config.AllowUntrustedTLS {
 		tr.TLSClientConfig = &tls.Config{InsecureSkipVerify: true} // #nosec
 	}
 
 	client := http.Client{
-		Timeout:   timeout,
+		Timeout:   10 * time.Second,
 		Transport: tr,
 		CheckRedirect: func(req *http.Request, via []*http.Request) error {
-			if followRedirects {
-				return nil
+			if len(via) >= 3 {
+				return errors.New("too many redirects")
 			}
-			return http.ErrUseLastResponse
+			if !followRedirects {
+				return http.ErrUseLastResponse
+			}
+			if !tools.IsValidLinkURL(req.URL.String()) {
+				return fmt.Errorf("blocked redirect to invalid URL: %s", req.URL)
+			}
+			return nil
 		},
 	}
 
@@ -92,7 +116,6 @@ func doHead(link string, followRedirects bool) (int, error) {
 		}
 
 		return 0, err
-
 	}
 
 	return res.StatusCode, nil
@@ -107,8 +130,33 @@ func httpErrorSummary(err error) string {
 	if !re.MatchString(e) {
 		return e
 	}
-
 	parts := re.FindAllStringSubmatch(e, -1)
 
 	return parts[0][len(parts[0])-1]
 }
+
+// SafeDialContext is a custom dialer that checks if the resolved IP addresses are internal before allowing the connection.
+func safeDialContext(dialer *net.Dialer) func(ctx context.Context, network, address string) (net.Conn, error) {
+	return func(ctx context.Context, network, address string) (net.Conn, error) {
+		host, port, err := net.SplitHostPort(address)
+		if err != nil {
+			return nil, err
+		}
+
+		ips, err := net.DefaultResolver.LookupIPAddr(ctx, host)
+		if err != nil {
+			return nil, err
+		}
+
+		if !config.AllowInternalHTTPRequests {
+			for _, ip := range ips {
+				if tools.IsInternalIP(ip.IP) {
+					logger.Log().Warnf("[link-check] Blocked HEAD request to private/reserved address: %s (%s)", host, ip)
+					return nil, fmt.Errorf("blocked request to %s (%s): private/reserved address", host, ip)
+				}
+			}
+		}
+
+		return dialer.DialContext(ctx, network, net.JoinHostPort(ips[0].IP.String(), port))
+	}
+}

internal/smtpd/forward.go

@@ -10,20 +10,25 @@ import (
 	"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) {
@@ -108,6 +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 (
@@ -73,10 +74,36 @@ func SaveToDatabase(origin net.Addr, from string, to []string, data []byte, smtp
 	}
 
 	// 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)
@@ -225,15 +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
 	}
 

internal/smtpd/relay.go

@@ -2,7 +2,6 @@ package smtpd
 
 import (
 	"crypto/tls"
-	"errors"
 	"fmt"
 	"net/smtp"
 	"os"
@@ -11,10 +10,11 @@ import (
 	"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 {
@@ -29,16 +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 {
@@ -48,16 +50,20 @@ 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) {
@@ -134,26 +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()
@@ -186,7 +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) {

internal/smtpd/smtpd.go

@@ -15,6 +15,7 @@ import (
 	"io/fs"
 	"log"
 	"net"
+	"net/mail"
 	"os"
 	"regexp"
 	"strconv"
@@ -361,8 +362,9 @@ func (s *session) serve() {
 	// otherwise results in a 5s timeout for each connection
 	defer func(c net.Conn) { _ = c.Close() }(s.conn)
 
+	var gotEHLO bool
 	var from string
-	var gotFrom bool
+	var gotFROM bool
 	var to []string
 	var hasRejectedRecipients bool
 	var buffer bytes.Buffer
@@ -396,8 +398,9 @@ loop:
 			s.writef("250 %s greets %s", s.srv.Hostname, s.remoteName)
 
 			// RFC 2821 section 4.1.4 specifies that EHLO has the same effect as RSET, so reset for HELO too.
+			gotEHLO = true
 			from = ""
-			gotFrom = false
+			gotFROM = false
 			to = nil
 			hasRejectedRecipients = false
 			buffer.Reset()
@@ -406,8 +409,9 @@ loop:
 			s.writef("%s", s.makeEHLOResponse())
 
 			// RFC 2821 section 4.1.4 specifies that EHLO has the same effect as RSET.
+			gotEHLO = true
 			from = ""
-			gotFrom = false
+			gotFROM = false
 			to = nil
 			hasRejectedRecipients = false
 			buffer.Reset()
@@ -420,10 +424,22 @@ loop:
 				s.writef("530 5.7.0 Authentication required")
 				break
 			}
+			if !gotEHLO {
+				s.writef("503 5.5.1 Bad sequence of commands (HELO/EHLO required before MAIL)")
+				break
+			}
+			if to != nil {
+				s.writef("503 5.5.1 Bad sequence of commands (RSET/HELO/EHLO required before MAIL)")
+				break
+			}
 
-			match := mailFromRE.FindStringSubmatch(args)
+			match, err := extractAndValidateAddress(mailFromRE, args)
 			if match == nil {
-				s.writef("501 5.5.4 Syntax error in parameters or arguments (invalid FROM parameter)")
+				if err != nil {
+					s.writef("%s", err.Error())
+				} else {
+					s.writef("501 5.5.4 Syntax error in parameters or arguments (invalid FROM parameter)")
+				}
 			} else {
 				// Mailpit Chaos
 				if fail, code := chaos.Config.Sender.Trigger(); fail {
@@ -437,7 +453,7 @@ loop:
 					if sizeMatch == nil {
 						// ignore other parameter
 						from = match[1]
-						gotFrom = true
+						gotFROM = true
 						s.writef("250 2.1.0 Ok")
 					} else {
 						// Enforce the maximum message size if one is set.
@@ -449,13 +465,13 @@ loop:
 							s.writef("%s", err.Error())
 						} else { // SIZE ok
 							from = match[1]
-							gotFrom = true
+							gotFROM = true
 							s.writef("250 2.1.0 Ok")
 						}
 					}
 				} else { // No parameters after FROM
 					from = match[1]
-					gotFrom = true
+					gotFROM = true
 					s.writef("250 2.1.0 Ok")
 				}
 			}
@@ -472,14 +488,18 @@ loop:
 				s.writef("530 5.7.0 Authentication required")
 				break
 			}
-			if !gotFrom {
+			if !gotFROM {
 				s.writef("503 5.5.1 Bad sequence of commands (MAIL required before RCPT)")
 				break
 			}
 
-			match := rcptToRE.FindStringSubmatch(args)
+			match, err := extractAndValidateAddress(rcptToRE, args)
 			if match == nil {
-				s.writef("501 5.5.4 Syntax error in parameters or arguments (invalid TO parameter)")
+				if err != nil {
+					s.writef("%s", err.Error())
+				} else {
+					s.writef("501 5.5.4 Syntax error in parameters or arguments (invalid TO parameter)")
+				}
 			} else {
 				// Mailpit Chaos
 				if fail, code := chaos.Config.Recipient.Trigger(); fail {
@@ -515,7 +535,7 @@ loop:
 				break
 			}
 			hasRecipients := len(to) > 0 || hasRejectedRecipients
-			if !gotFrom || !hasRecipients {
+			if !gotFROM || !hasRecipients {
 				s.writef("503 5.5.1 Bad sequence of commands (MAIL & RCPT required before DATA)")
 				break
 			}
@@ -593,7 +613,7 @@ loop:
 
 			// Reset for next mail.
 			from = ""
-			gotFrom = false
+			gotFROM = false
 			to = nil
 			hasRejectedRecipients = false
 			buffer.Reset()
@@ -607,7 +627,7 @@ loop:
 			}
 			s.writef("250 2.0.0 Ok")
 			from = ""
-			gotFrom = false
+			gotFROM = false
 			to = nil
 			hasRejectedRecipients = false
 			buffer.Reset()
@@ -684,7 +704,7 @@ loop:
 			// RFC 3207 specifies that the server must discard any prior knowledge obtained from the client.
 			s.remoteName = ""
 			from = ""
-			gotFrom = false
+			gotFROM = false
 			to = nil
 			hasRejectedRecipients = false
 			buffer.Reset()
@@ -706,7 +726,7 @@ loop:
 			}
 
 			// RFC 4954 specifies that AUTH is not permitted during mail transactions.
-			if gotFrom || len(to) > 0 {
+			if gotFROM || len(to) > 0 {
 				s.writef("503 5.5.1 Bad sequence of commands (AUTH not permitted during mail transaction)")
 				break
 			}
@@ -908,6 +928,10 @@ func (s *session) makeEHLOResponse() (response string) {
 	}
 
 	response += "250-ENHANCEDSTATUSCODES\r\n"
+	// RFC 6531 specifies that the presence of SMTPUTF8 should include 8BITMIME
+	// "Servers offering this extension MUST provide support for, and announce, the 8BITMIME extension"
+	// https://www.rfc-editor.org/rfc/rfc6531#section-3.1:
+	response += "250-8BITMIME\r\n"
 	response += "250 SMTPUTF8" // last entry must use a space instead of a dash
 	return
 }
@@ -975,6 +999,12 @@ 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
 }
@@ -1008,3 +1038,35 @@ func (s *session) handleAuthCramMD5() (bool, error) {
 
 	return authenticated, err
 }
+
+// Extract and validate email address from a regex match.
+// This ensures that only RFC 5322 compliant email addresses are accepted (if set).
+func extractAndValidateAddress(re *regexp.Regexp, args string) ([]string, error) {
+	match := re.FindStringSubmatch(args)
+	if match == nil {
+		return nil, nil
+	}
+
+	if strings.Contains(match[1], " ") {
+		return nil, errors.New("553 5.1.3 The address is not a valid RFC 5321 address")
+	}
+
+	// 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, errors.New("553 5.1.3 The address is not a valid RFC 5321 address")
+		}
+
+		// https://datatracker.ietf.org/doc/html/rfc5321#section-4.5.3.1
+		// RFC states that the local part of an email address SHOULD not exceed 64 characters
+		// and the domain part SHOULD not exceed 255 characters, however as per https://github.com/axllent/mailpit/issues/620
+		// it appears that investigated mail servers do not actually implement this limit, but rather enforce
+		// a much larger limit (ie: 1024 characters).
+		if len(a.Address) > 1024 {
+			return nil, errors.New("500 The address is too long")
+		}
+	}
+
+	return match, nil
+}

internal/smtpd/smtpd_test.go

@@ -104,6 +104,19 @@ 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: <recipientrecipientrecipientreciprecipientrecipientrecipientreciptrecipientrecipientrecipientreciprecipientrecipientrecipientreciptrecipientrecipientrecipientreciprecipientrecipientrecipientreciptrecipientrecipientrecipientreciprecipientrecipientrecipientreciptrecipientrecipientrecipientreciprecipientrecipientrecipientreciptrecipientrecipientrecipientreciprecipientrecipientrecipientreciptrecipientrecipientrecipientreciprecipientrecipientrecipientreciptrecipientrecipientrecipientreciprecipientrecipientrecipientreciptrecipientrecipientrecipientreciprecipientrecipientrecipientreciptrecipientrecipientrecipientreciprecipientrecipientrecipientreciptrecipientrecipientrecipientreciprecipientrecipientrecipientreciptrecipientrecipientrecipientreciprecipientrecipientrecipientreciptrecipientrecipientrecipientreciprecipientrecipientrecipientreciptrecipientrecipientrecipientreciprecipientrecipientrecipientreciptrecipientrecipientrecipient@exampleexampleexampleexampleexampleexampleexampleexampleexampleexampleexampleexampleexampleexampleexampleexampleexample.com>", "500") // too long
+	cmdCode(t, conn, "RCPT TO:<recipientexample.com>", "553")
+	cmdCode(t, conn, "RCPT TO: <recipient@test@example.com>", "553")
+	cmdCode(t, conn, "RCPT TO: <recipient@@example.com>", "553")
+	cmdCode(t, conn, "RCPT TO: <recipientexample.com>", "553")
+	cmdCode(t, conn, "RCPT TO:  <recipientexample.com>", "501")
+	cmdCode(t, conn, "RCPT TO:<recipient\rexample.com>", "553")
+	cmdCode(t, conn, "RCPT TO: <recipient\rexample.com>", "553")
+	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")
 
@@ -111,6 +124,41 @@ func TestCmdEHLO(t *testing.T) {
 	_ = conn.Close()
 }
 
+func TestCmdMAILBeforeEHLO(t *testing.T) {
+	conn := newConn(t, &Server{})
+	// RFC 5321 §4.1.4 — Order of Commands states (emphasis added):
+	// “The SMTP client MUST issue HELO or EHLO before any other SMTP commands.”
+	cmdCode(t, conn, "MAIL FROM:<sender@example.com>", "503")
+
+	cmdCode(t, conn, "QUIT", "221")
+	_ = conn.Close()
+}
+
+func TestCmdMAILAfterRCPT(t *testing.T) {
+	conn := newConn(t, &Server{})
+
+	// Send EHLO, expect greeting
+	cmdCode(t, conn, "EHLO host.example.com", "250")
+
+	// Send MAIL FROM
+	cmdCode(t, conn, "MAIL FROM:<sender@example.com>", "250")
+
+	// Send RCPT TO
+	cmdCode(t, conn, "RCPT TO:<recipient@example.com>", "250")
+
+	// MAIL FROM must not come after RCPT TO in the same transaction
+	cmdCode(t, conn, "MAIL FROM:<sender2@example.com>", "503")
+
+	// RSET to clear the transaction
+	cmdCode(t, conn, "RSET", "250")
+
+	// Now the MAIL FROM should be accepted
+	cmdCode(t, conn, "MAIL FROM:<sender2@example.com>", "250")
+
+	cmdCode(t, conn, "QUIT", "221")
+	_ = conn.Close()
+}
+
 func TestCmdRSET(t *testing.T) {
 	conn := newConn(t, &Server{})
 	cmdCode(t, conn, "EHLO host.example.com", "250")
@@ -131,7 +179,7 @@ func TestCmdMAIL(t *testing.T) {
 
 	// MAIL with no FROM arg should return 501 syntax error
 	cmdCode(t, conn, "MAIL", "501")
-	// MAIL with empty FROM arg should return 501 syntax error
+	// // MAIL with empty FROM arg should return 501 syntax error
 	cmdCode(t, conn, "MAIL FROM:", "501")
 	cmdCode(t, conn, "MAIL FROM: ", "501")
 	cmdCode(t, conn, "MAIL FROM:  ", "501")
@@ -145,6 +193,20 @@ 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: <sendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersendersender@exampleexampleexampleexampleexampleexampleexampleexampleexampleexampleexampleexampleexampleexampleexampleexampleexample.com>", "500") // too long
+	cmdCode(t, conn, "MAIL FROM:<sender\rexample.com>", "553")
+	cmdCode(t, conn, "MAIL FROM: <sender\rexample.com>", "553")
+	cmdCode(t, conn, "MAIL FROM:  <sender\rexample.com>", "501")
+	cmdCode(t, conn, "MAIL FROM:<senderexample.com>", "553")
+	cmdCode(t, conn, "MAIL FROM: <sender@@example.com>", "553")
+	cmdCode(t, conn, "MAIL FROM: <sender@test@example.com>", "553")
+	cmdCode(t, conn, "MAIL FROM: <senderexample.com>", "553")
+	cmdCode(t, conn, "MAIL FROM:  <senderexample.com>", "501")
+	cmdCode(t, conn, "MAIL FROM: < sender@example.com >", "553")
+	cmdCode(t, conn, "MAIL FROM: < sender@example.com>", "553")
+	cmdCode(t, conn, "MAIL FROM: <sender@example.com >", "553")
+
 	// MAIL with valid SIZE parameter should return 250 Ok
 	cmdCode(t, conn, "MAIL FROM:<sender@example.com> SIZE=1000", "250")
 
@@ -153,10 +215,10 @@ func TestCmdMAIL(t *testing.T) {
 	cmdCode(t, conn, "MAIL FROM:<sender@example.com> SIZE= ", "501")
 	cmdCode(t, conn, "MAIL FROM:<sender@example.com> SIZE=foo", "501")
 
-	// MAIL with options should be ignored except for SIZE
-	cmdCode(t, conn, "MAIL FROM:<sender@example.com> BODY=8BITMIME", "250")           // ignored
-	cmdCode(t, conn, "MAIL FROM:<sender@example.com> BODY=8BITMIME,SIZE=1000", "250") // size detected
-	cmdCode(t, conn, "MAIL FROM:<sender@example.com> BODY=8BITMIME,SIZE=foo", "501")  // ignored
+	// MAIL with BODY parameter should be accepted (8BITMIME support)
+	cmdCode(t, conn, "MAIL FROM:<sender@example.com> BODY=8BITMIME", "250")
+	cmdCode(t, conn, "MAIL FROM:<sender@example.com> BODY=8BITMIME,SIZE=1000", "250")
+	cmdCode(t, conn, "MAIL FROM:<sender@example.com> BODY=8BITMIME,SIZE=foo", "501") // SIZE validation error
 
 	// TODO: MAIL with valid AUTH parameter should return 250 Ok
 
@@ -212,6 +274,7 @@ func TestCmdRCPT(t *testing.T) {
 	cmdCode(t, conn, "RCPT TO:", "501")
 	cmdCode(t, conn, "RCPT TO: ", "501")
 	cmdCode(t, conn, "RCPT TO:  ", "501")
+	cmdCode(t, conn, "RCPT TO:<@route.example user@example.com>", "553")
 
 	// RCPT with valid TO arg should return 250 Ok
 	cmdCode(t, conn, "RCPT TO:<recipient@example.com>", "250")
@@ -821,6 +884,105 @@ func TestMakeEHLOResponse(t *testing.T) {
 	if !rePlain.MatchString(extensions["AUTH"]) {
 		t.Errorf("AUTH mechanism PLAIN does not appear in the extension list when an AuthHandler is specified and TLS is in use")
 	}
+
+	// 8BITMIME should always be advertised
+	s.srv = &Server{}
+	s.tls = false
+	extensions = parseExtensions(t, s.makeEHLOResponse())
+	if _, ok := extensions["8BITMIME"]; !ok {
+		t.Errorf("8BITMIME does not appear in the extension list")
+	}
+
+	// SMTPUTF8 should always be advertised
+	if _, ok := extensions["SMTPUTF8"]; !ok {
+		t.Errorf("SMTPUTF8 does not appear in the extension list")
+	}
+
+	// ENHANCEDSTATUSCODES should always be advertised
+	if _, ok := extensions["ENHANCEDSTATUSCODES"]; !ok {
+		t.Errorf("ENHANCEDSTATUSCODES does not appear in the extension list")
+	}
+}
+
+// Test 8BITMIME BODY parameter parsing in MAIL FROM command
+func TestCmd8BITMIME(t *testing.T) {
+	srv := &Server{}
+	conn := newConn(t, srv)
+	cmdCode(t, conn, "EHLO host.example.com", "250")
+
+	// Create a session to check internal state
+	clientConn, serverConn := net.Pipe()
+	session := srv.newSession(serverConn)
+	go session.serve()
+
+	// Read and discard banner
+	_, _ = bufio.NewReader(clientConn).ReadString('\n')
+
+	// Send EHLO
+	_, _ = fmt.Fprintf(clientConn, "EHLO test.example.com\r\n")
+	reader := bufio.NewReader(clientConn)
+	for {
+		line, _ := reader.ReadString('\n')
+		if strings.HasPrefix(line, "250 ") {
+			break
+		}
+	}
+
+	// Test BODY=8BITMIME parameter
+	_, _ = fmt.Fprintf(clientConn, "MAIL FROM:<sender@example.com> BODY=8BITMIME\r\n")
+	resp, _ := reader.ReadString('\n')
+	if !strings.HasPrefix(resp, "250") {
+		t.Errorf("MAIL FROM with BODY=8BITMIME failed: %s", resp)
+	}
+
+	// Verify bodyEncoding was set (we can't directly access it, but we can test the behavior)
+	// Reset and test BODY=7BIT
+	_, _ = fmt.Fprintf(clientConn, "RSET\r\n")
+	_, _ = reader.ReadString('\n')
+
+	_, _ = fmt.Fprintf(clientConn, "MAIL FROM:<sender@example.com> BODY=7BIT\r\n")
+	resp, _ = reader.ReadString('\n')
+	if !strings.HasPrefix(resp, "250") {
+		t.Errorf("MAIL FROM with BODY=7BIT failed: %s", resp)
+	}
+
+	// Test BODY parameter with SIZE parameter
+	_, _ = fmt.Fprintf(clientConn, "RSET\r\n")
+	_, _ = reader.ReadString('\n')
+
+	_, _ = fmt.Fprintf(clientConn, "MAIL FROM:<sender@example.com> SIZE=1000 BODY=8BITMIME\r\n")
+	resp, _ = reader.ReadString('\n')
+	if !strings.HasPrefix(resp, "250") {
+		t.Errorf("MAIL FROM with SIZE and BODY parameters failed: %s", resp)
+	}
+
+	// Test case insensitivity
+	_, _ = fmt.Fprintf(clientConn, "RSET\r\n")
+	_, _ = reader.ReadString('\n')
+
+	_, _ = fmt.Fprintf(clientConn, "MAIL FROM:<sender@example.com> body=8bitmime\r\n")
+	resp, _ = reader.ReadString('\n')
+	if !strings.HasPrefix(resp, "250") {
+		t.Errorf("MAIL FROM with lowercase body parameter failed: %s", resp)
+	}
+
+	// Clean up
+	_, _ = fmt.Fprintf(clientConn, "QUIT\r\n")
+	_, _ = reader.ReadString('\n')
+	_ = clientConn.Close()
+
+	// Also test via the original connection
+	cmdCode(t, conn, "MAIL FROM:<sender@example.com> BODY=8BITMIME", "250")
+	cmdCode(t, conn, "RCPT TO:<recipient@example.com>", "250")
+
+	cmdCode(t, conn, "RSET", "250")
+	cmdCode(t, conn, "MAIL FROM:<sender@example.com> BODY=7BIT", "250")
+
+	cmdCode(t, conn, "RSET", "250")
+	cmdCode(t, conn, "MAIL FROM:<sender@example.com> BODY=8BITMIME SIZE=5000", "250")
+
+	cmdCode(t, conn, "QUIT", "221")
+	_ = conn.Close()
 }
 
 // func createTmpFile(content string) (file *os.File, err error) {

internal/storage/messages.go

@@ -3,6 +3,9 @@ package storage
 import (
 	"bytes"
 	"context"
+	"crypto/md5"  // #nosec
+	"crypto/sha1" // #nosec
+	"crypto/sha256"
 	"database/sql"
 	"encoding/base64"
 	"encoding/hex"
@@ -505,6 +508,14 @@ func AttachmentSummary(a *enmime.Part) Attachment {
 	o.ContentID = a.ContentID
 	o.Size = uint64(len(a.Content))
 
+	md5Hash := md5.Sum(a.Content)   // #nosec
+	sha1Hash := sha1.Sum(a.Content) // #nosec
+	sha256Hash := sha256.Sum256(a.Content)
+
+	o.Checksums.MD5 = hex.EncodeToString(md5Hash[:])
+	o.Checksums.SHA1 = hex.EncodeToString(sha1Hash[:])
+	o.Checksums.SHA256 = hex.EncodeToString(sha256Hash[:])
+
 	return o
 }
 

internal/storage/messages_test.go

@@ -1,6 +1,7 @@
 package storage
 
 import (
+	"os"
 	"testing"
 	"time"
 
@@ -204,3 +205,99 @@ func BenchmarkImportMime(b *testing.B) {
 	}
 
 }
+
+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)
+	}
+
+	// Checksum tests
+	assertEqual(t, msg.Attachments[0].Checksums.MD5, "b04930eb1ba0c62066adfa87e5d262c4", "Attachment MD5 checksum does not match")
+	assertEqual(t, msg.Attachments[0].Checksums.SHA1, "15605d6a2fca44e966209d1701f16ecf816df880", "Attachment SHA1 checksum does not match")
+	assertEqual(t, msg.Attachments[0].Checksums.SHA256, "92c4ccff376003381bd9054d3da7b32a3c5661905b55e3b0728c17aba6d223ec", "Attachment SHA256 checksum does not match")
+}
+
+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/reindex.go

@@ -27,7 +27,7 @@ func ReindexAll() {
 	err := sqlf.Select("ID").To(&i).
 		From(tenant("mailbox")).
 		OrderBy("Created DESC").
-		QueryAndClose(context.TODO(), db, func(row *sql.Rows) {
+		QueryAndClose(context.TODO(), db, func(_ *sql.Rows) {
 			ids = append(ids, i)
 		})
 

internal/storage/settings.go

@@ -15,7 +15,7 @@ func SettingGet(k string) string {
 		Select("Value").To(&result).
 		Where("Key = ?", k).
 		Limit(1).
-		QueryAndClose(context.TODO(), db, func(row *sql.Rows) {})
+		QueryAndClose(context.TODO(), db, func(_ *sql.Rows) {})
 	if err != nil {
 		logger.Log().Errorf("[db] %s", err.Error())
 		return ""
@@ -41,7 +41,7 @@ func getDeletedSize() uint64 {
 		Select("Value").To(&result).
 		Where("Key = ?", "DeletedSize").
 		Limit(1).
-		QueryAndClose(context.TODO(), db, func(row *sql.Rows) {})
+		QueryAndClose(context.TODO(), db, func(_ *sql.Rows) {})
 	if err != nil {
 		logger.Log().Errorf("[db] %s", err.Error())
 		return 0
@@ -55,7 +55,7 @@ func totalMessagesSize() uint64 {
 	var result sql.NullFloat64
 	err := sqlf.From(tenant("mailbox")).
 		Select("SUM(Size)").To(&result).
-		QueryAndClose(context.TODO(), db, func(row *sql.Rows) {})
+		QueryAndClose(context.TODO(), db, func(_ *sql.Rows) {})
 	if err != nil {
 		logger.Log().Errorf("[db] %s", err.Error())
 		return 0

internal/storage/structs.go

@@ -48,7 +48,7 @@ type Message struct {
 	Attachments []Attachment
 }
 
-// Attachment struct for inline and attachments
+// Attachment struct for inline images and attachments
 //
 // swagger:model Attachment
 type Attachment struct {
@@ -62,6 +62,15 @@ type Attachment struct {
 	ContentID string
 	// Size in bytes
 	Size uint64
+	// File checksums
+	Checksums struct {
+		// MD5 checksum hash of file
+		MD5 string
+		// SHA1 checksum hash of file
+		SHA1 string
+		// SHA256 checksum hash of file
+		SHA256 string
+	}
 }
 
 // MessageSummary struct for frontend messages

internal/storage/tags.go

@@ -147,7 +147,7 @@ func GetAllTags() []string {
 		Select(`DISTINCT Name`).
 		From(tenant("tags")).To(&name).
 		OrderBy("Name").
-		QueryAndClose(context.TODO(), db, func(row *sql.Rows) {
+		QueryAndClose(context.TODO(), db, func(_ *sql.Rows) {
 			tags = append(tags, name)
 		}); err != nil {
 		logger.Log().Errorf("[db] %s", err.Error())
@@ -169,7 +169,7 @@ func GetAllTagsCount() map[string]int64 {
 		LeftJoin(tenant("message_tags"), tenant("tags.ID")+" = "+tenant("message_tags.TagID")).
 		GroupBy(tenant("message_tags.TagID")).
 		OrderBy("Name").
-		QueryAndClose(context.TODO(), db, func(row *sql.Rows) {
+		QueryAndClose(context.TODO(), db, func(_ *sql.Rows) {
 			tags[name] = int64(total)
 		}); err != nil {
 		logger.Log().Errorf("[db] %s", err.Error())
@@ -352,7 +352,7 @@ func getMessageTags(id string) []string {
 		LeftJoin(tenant("message_tags"), tenant("Tags.ID")+"="+tenant("message_tags.TagID")).
 		Where(tenant("message_tags.ID")+` = ?`, id).
 		OrderBy("Name").
-		QueryAndClose(context.TODO(), db, func(row *sql.Rows) {
+		QueryAndClose(context.TODO(), db, func(_ *sql.Rows) {
 			tags = append(tags, name)
 		}); err != nil {
 		logger.Log().Errorf("[tags] %s", err.Error())

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/tools/net.go

@@ -0,0 +1,28 @@
+package tools
+
+import (
+	"net"
+	"net/url"
+)
+
+// IsInternalIP checks if the given IP address is an internal IP address (e.g., loopback, private, link-local, or multicast).
+// IsLoopback — 127.0.0.0/8, ::1
+// IsPrivate — 10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16, fc00::/7
+// IsLinkLocalUnicast — 169.254.0.0/16, fe80::/10 (covers cloud metadata 169.254.169.254)
+// IsLinkLocalMulticast — 224.0.0.0/24, ff02::/16
+// IsUnspecified — 0.0.0.0, ::
+// IsMulticast — 224.0.0.0/4, ff00::/8
+func IsInternalIP(ip net.IP) bool {
+	return ip.IsLoopback() ||
+		ip.IsPrivate() ||
+		ip.IsLinkLocalUnicast() ||
+		ip.IsLinkLocalMulticast() ||
+		ip.IsUnspecified() ||
+		ip.IsMulticast()
+}
+
+// IsValidLinkURL checks if the provided string is a valid URL with http or https scheme and a non-empty hostname.
+func IsValidLinkURL(str string) bool {
+	u, err := url.Parse(str)
+	return err == nil && (u.Scheme == "http" || u.Scheme == "https") && u.Hostname() != ""
+}

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)

package.json

@@ -12,7 +12,7 @@
     "lint-fix": "eslint --fix && prettier --write ."
   },
   "dependencies": {
-    "axios": "^1.11.0",
+    "axios": "^1.13.5",
     "bootstrap": "^5.2.0",
     "bootstrap-icons": "^1.9.1",
     "bootstrap5-tags": "^1.6.1",
@@ -30,17 +30,19 @@
     "vue-router": "^4.2.4"
   },
   "devDependencies": {
-    "@eslint/compat": "^1.3.1",
+    "@eslint/compat": "^2.0.2",
+    "@eslint/js": "^10.0.1",
     "@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",
-    "eslint": "^9.29.0",
+    "eslint": "^10.0.1",
     "eslint-config-prettier": "^10.1.5",
     "eslint-plugin-vue": "^10.2.0",
+    "globals": "^17.3.0",
     "prettier": "^3.5.3"
   },
   "prettier": {

server/apiv1/thumbnails.go

@@ -76,13 +76,14 @@ func Thumbnail(w http.ResponseWriter, r *http.Request) {
 	var b bytes.Buffer
 	foo := bufio.NewWriter(&b)
 
-	var dstImageFill *image.NRGBA
-
+	var temp image.Image
 	if img.Bounds().Dx() < thumbWidth || img.Bounds().Dy() < thumbHeight {
-		dstImageFill = imaging.Fit(img, thumbWidth, thumbHeight, imaging.Lanczos)
+		temp = imaging.Fit(img, thumbWidth, thumbHeight, imaging.Lanczos)
 	} else {
-		dstImageFill = imaging.Fill(img, thumbWidth, thumbHeight, imaging.Center, imaging.Lanczos)
+		temp = imaging.Fill(img, thumbWidth, thumbHeight, imaging.Center, imaging.Lanczos)
 	}
+	dstImageFill := imaging.Clone(temp)
+
 	// create white image and paste image over the top
 	// preventing black backgrounds for transparent GIF/PNG images
 	dst := imaging.New(thumbWidth, thumbHeight, color.White)

server/cors.go

@@ -0,0 +1,130 @@
+package server
+
+import (
+	"net/http"
+	"net/url"
+	"sort"
+	"strings"
+
+	"github.com/axllent/mailpit/internal/logger"
+)
+
+var (
+	// AccessControlAllowOrigin CORS policy - set with flags/env
+	AccessControlAllowOrigin string
+
+	// CorsAllowOrigins are optional allowed origins by hostname, set via setCORSOrigins().
+	corsAllowOrigins = make(map[string]bool)
+)
+
+// equalASCIIFold reports whether s and t, interpreted as UTF-8 strings, are equal
+// under Unicode case folding, ignoring any difference in length.
+func asciiFoldString(s string) string {
+	b := make([]byte, len(s))
+	for i := range s {
+		b[i] = toLowerASCIIFold(s[i])
+	}
+	return string(b)
+}
+
+// toLowerASCIIFold returns the Unicode case-folded equivalent of the ASCII character c.
+// It is equivalent to the Unicode 13.0.0 function foldCase(c, CaseFoldingMapping).
+func toLowerASCIIFold(c byte) byte {
+	if 'A' <= c && c <= 'Z' {
+		return c + 'a' - 'A'
+	}
+	return c
+}
+
+// CorsOriginAccessControl checks if the request origin is allowed based on the configured CORS origins.
+func corsOriginAccessControl(r *http.Request) bool {
+	origin := r.Header["Origin"]
+
+	if len(origin) != 0 {
+		u, err := url.Parse(origin[0])
+		if err != nil {
+			logger.Log().Errorf("[cors] origin parse error: %v", err)
+			return false
+		}
+
+		_, allAllowed := corsAllowOrigins["*"]
+		// allow same origin || is "*" is defined as an origin
+		if asciiFoldString(u.Host) == asciiFoldString(r.Host) || allAllowed {
+			return true
+		}
+
+		originHostFold := asciiFoldString(u.Hostname())
+		if corsAllowOrigins[originHostFold] {
+			return true
+		}
+
+		logger.Log().Warnf("[cors] blocking request from unauthorized origin: %s", u.Hostname())
+
+		return false
+	}
+
+	return true
+}
+
+// SetCORSOrigins sets the allowed CORS origins from a comma-separated string.
+// It does not consider port or protocol, only the hostname.
+func setCORSOrigins() {
+	corsAllowOrigins = make(map[string]bool)
+
+	hosts := extractOrigins(AccessControlAllowOrigin)
+	for _, host := range hosts {
+		corsAllowOrigins[asciiFoldString(host)] = true
+	}
+
+	if _, wildCard := corsAllowOrigins["*"]; wildCard {
+		// reset to just wildcard
+		corsAllowOrigins = make(map[string]bool)
+		corsAllowOrigins["*"] = true
+		logger.Log().Info("[cors] all origins are allowed due to wildcard \"*\"")
+	} else {
+		keys := make([]string, 0)
+		for k := range corsAllowOrigins {
+			keys = append(keys, k)
+		}
+		sort.Strings(keys)
+		logger.Log().Infof("[cors] allowed API origins: %v", strings.Join(keys, ", "))
+	}
+}
+
+// extractOrigins extracts and returns a sorted list of origins from a comma-separated string.
+func extractOrigins(str string) []string {
+	origins := make([]string, 0)
+	s := strings.TrimSpace(str)
+	if s == "" {
+		return origins
+	}
+
+	hosts := strings.FieldsFunc(s, func(r rune) bool {
+		return r == ',' || r == ' '
+	})
+
+	for _, host := range hosts {
+		h := strings.TrimSpace(host)
+		if h != "" {
+			if h == "*" {
+				return []string{"*"}
+			}
+
+			if !strings.HasPrefix(h, "http://") && !strings.HasPrefix(h, "https://") {
+				h = "http://" + h
+			}
+
+			u, err := url.Parse(h)
+			if err != nil || u.Hostname() == "" || strings.Contains(h, "*") {
+				logger.Log().Warnf("[cors] invalid CORS origin \"%s\", ignoring", h)
+				continue
+			}
+
+			origins = append(origins, u.Hostname())
+		}
+	}
+
+	sort.Strings(origins)
+
+	return origins
+}

server/cors_test.go

@@ -0,0 +1,119 @@
+package server
+
+import (
+	"net/http"
+	"testing"
+)
+
+func TestExtractOrigins(t *testing.T) {
+	tests := []struct {
+		name     string
+		input    string
+		expected []string
+	}{
+		{
+			name:     "empty string",
+			input:    "",
+			expected: []string{},
+		},
+		{
+			name:     "single hostname",
+			input:    "example.com",
+			expected: []string{"example.com"},
+		},
+		{
+			name:     "multiple hostnames comma separated",
+			input:    "example.com,foo.com",
+			expected: []string{"example.com", "foo.com"},
+		},
+		{
+			name:     "multiple hostnames space separated",
+			input:    "example.com foo.com",
+			expected: []string{"example.com", "foo.com"},
+		},
+		{
+			name:     "wildcard",
+			input:    "*",
+			expected: []string{"*"},
+		},
+		{
+			name:     "mixed protocols",
+			input:    "http://example.com,https://foo.com:8080",
+			expected: []string{"example.com", "foo.com"},
+		},
+		{
+
+			name:     "embedded wildcard",
+			input:    "http://example.com,*,https://test",
+			expected: []string{"*"},
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got := extractOrigins(tt.input)
+
+			if len(got) != len(tt.expected) {
+				t.Errorf("expected %d origins, got %d", len(tt.expected), len(got))
+				return
+			}
+			for i := range got {
+				if got[i] != tt.expected[i] {
+					t.Errorf("expected origin %q, got %q", tt.expected[i], got[i])
+				}
+			}
+		})
+	}
+}
+
+func TestCorsOriginAccessControl(t *testing.T) {
+	// Setup allowed origins
+	AccessControlAllowOrigin = "example.com,foo.com,bar.com"
+	setCORSOrigins()
+
+	tests := []struct {
+		name   string
+		origin string
+		host   string
+		allow  bool
+	}{
+		{"no origin header", "", "example.com", true},
+		{"allowed origin", "http://example.com:1234", "mailpit.local", true},
+		{"not allowed origin", "http://notallowed.com", "mailpit.local", false},
+		{"allowed by hostname", "http://foo.com", "mailpit.local", true},
+		{"ascii fold: allowed origin uppercase", "HTTP://EXAMPLE.COM", "mailpit.local", true},
+		{"ascii fold: allowed by hostname uppercase", "HTTP://FOO.COM", "mailpit.local", true},
+		{"ascii fold: host uppercase", "http://example.com", "MAILPIT.LOCAL", true},
+		{"ascii fold: not allowed origin uppercase", "HTTP://NOTALLOWED.COM", "mailpit.local", false},
+		{"ascii fold: mixed case", "HtTp://ExAmPlE.CoM", "mailpit.local", true},
+		{"non-ascii: allowed origin (unicode hostname)", "http://exámple.com", "mailpit.local", false},
+		{"non-ascii: allowed by hostname (unicode)", "http://föö.com", "mailpit.local", false},
+		{"non-ascii: host uppercase (unicode)", "http://exámple.com", "MAILPIT.LOCAL", false},
+		{"non-ascii: mixed case (unicode)", "HtTp://ExÁmPlE.CoM", "mailpit.local", false},
+	}
+
+	// Add wildcard test
+	AccessControlAllowOrigin = "*"
+	setCORSOrigins()
+	reqWildcard := &http.Request{Header: http.Header{"Origin": {"http://any.com"}}, Host: "mailpit.local"}
+	if !corsOriginAccessControl(reqWildcard) {
+		t.Error("Wildcard origin should be allowed")
+	}
+
+	// Reset to specific hosts
+	AccessControlAllowOrigin = "example.com,foo.com,bar.com"
+	setCORSOrigins()
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			req := &http.Request{Header: http.Header{}, Host: tt.host}
+			if tt.origin != "" {
+				req.Header.Set("Origin", tt.origin)
+			}
+			allowed := corsOriginAccessControl(req)
+			if allowed != tt.allow {
+				t.Errorf("expected allowed=%v, got %v for origin=%q host=%q", tt.allow, allowed, tt.origin, tt.host)
+			}
+		})
+	}
+}

server/handlers/proxy.go

@@ -2,51 +2,140 @@
 package handlers
 
 import (
+	"context"
 	"crypto/tls"
+	"encoding/base64"
+	"errors"
 	"fmt"
 	"io"
+	"net"
 	"net/http"
 	"net/url"
 	"regexp"
 	"strings"
+	"sync"
 	"time"
 
+	"github.com/PuerkitoBio/goquery"
 	"github.com/axllent/mailpit/config"
 	"github.com/axllent/mailpit/internal/logger"
+	"github.com/axllent/mailpit/internal/storage"
+	"github.com/axllent/mailpit/internal/tools"
 )
 
-var linkRe = regexp.MustCompile(`(?i)^https?:\/\/`)
+var (
+	linkRe = regexp.MustCompile(`(?i)^https?:\/\/`)
 
-// ProxyHandler is used to proxy assets for printing
+	urlRe = regexp.MustCompile(`(?mU)url\(('|")?(https?:\/\/[^)'"]+)('|")?\)`)
+
+	assetsMutex sync.Mutex
+
+	assets = map[string]MessageAssets{}
+)
+
+// MessageAssets represents assets linked in a message
+type MessageAssets struct {
+	ID string
+	// Created timestamp so we can expire old entries
+	Created time.Time
+	// Assets found in the message
+	Assets []string
+}
+
+func init() {
+	// Start a goroutine to clean up old asset entries every minute
+	go func() {
+		for {
+			time.Sleep(time.Minute)
+			assetsMutex.Lock()
+			now := time.Now()
+			for id, entry := range assets {
+				if now.Sub(entry.Created) > time.Minute {
+					logger.Log().Debugf("[proxy] cleaning up assets for message %s", id)
+					delete(assets, id)
+				}
+			}
+			assetsMutex.Unlock()
+		}
+	}()
+}
+
+// ProxyHandler is used to proxy assets for printing.
+// It accepts a base64-encoded message-id:url string as the `data` query parameter.
 func ProxyHandler(w http.ResponseWriter, r *http.Request) {
-	uri := strings.TrimSpace(r.URL.Query().Get("url"))
-	if uri == "" {
-		logger.Log().Warn("[proxy] URL missing")
-		httpError(w, "Error: URL missing")
+	encoded := strings.TrimSpace(r.URL.Query().Get("data"))
+	if encoded == "" {
+		logger.Log().Warn("[proxy] Data missing")
+		httpError(w, "Error: Data missing")
 		return
 	}
 
-	if !linkRe.MatchString(uri) {
+	decoded, err := base64.StdEncoding.DecodeString(encoded)
+	if err != nil {
+		logger.Log().Warnf("[proxy] Data parameter corrupted: %s", err.Error())
+		httpError(w, "Error: invalid request")
+		return
+	}
+
+	parts := strings.SplitN(string(decoded), ":", 2)
+	if len(parts) != 2 {
+		logger.Log().Warnf("[proxy] Invalid data parameter: %s", string(decoded))
+		httpError(w, "Error: invalid request")
+		return
+	}
+
+	id := parts[0]
+	uri := parts[1]
+
+	links, err := getAssets(id)
+	if err != nil {
+		httpError(w, "Error: invalid request")
+		return
+	}
+
+	if !tools.InArray(uri, links) {
+		logger.Log().Warnf("[proxy] URL %s not found in message %s", uri, id)
+		httpError(w, "Error: invalid request")
+		return
+	}
+
+	if !linkRe.MatchString(uri) || !tools.IsValidLinkURL(uri) {
 		logger.Log().Warnf("[proxy] invalid URL %s", uri)
 		httpError(w, "Error: invalid URL")
 		return
 	}
 
-	tr := &http.Transport{}
+	dialer := &net.Dialer{
+		Timeout:   10 * time.Second,
+		KeepAlive: 30 * time.Second,
+	}
+
+	tr := &http.Transport{
+		DialContext: safeDialContext(dialer),
+	}
 
 	if config.AllowUntrustedTLS {
 		tr.TLSClientConfig = &tls.Config{InsecureSkipVerify: true} // #nosec
 	}
 
 	client := &http.Client{
-		Transport: tr,
 		Timeout:   10 * time.Second,
+		Transport: tr,
+		CheckRedirect: func(req *http.Request, via []*http.Request) error {
+			if len(via) >= 3 {
+				return errors.New("too many redirects")
+			}
+			if !tools.IsValidLinkURL(req.URL.String()) {
+				return fmt.Errorf("blocked redirect to invalid URL: %s", req.URL)
+			}
+			return nil
+		},
 	}
 
 	req, err := http.NewRequest("GET", uri, nil)
 	if err != nil {
 		logger.Log().Warnf("[proxy] %s", err.Error())
-		httpError(w, err.Error())
+		httpError(w, "Error: invalid request")
 		return
 	}
 
@@ -56,23 +145,34 @@ func ProxyHandler(w http.ResponseWriter, r *http.Request) {
 	resp, err := client.Do(req)
 	if err != nil {
 		logger.Log().Warnf("[proxy] %s", err.Error())
-		httpError(w, err.Error())
+		httpError(w, "Error: invalid request")
 		return
 	}
 
 	defer func() { _ = resp.Body.Close() }()
 
+	if resp.StatusCode < 200 || resp.StatusCode >= 300 {
+		logger.Log().Warnf("[proxy] received status code %d for %s", resp.StatusCode, uri)
+		httpError(w, "Error: invalid request")
+		return
+	}
+
+	ct := strings.ToLower(resp.Header.Get("content-type"))
+	if !supportedProxyContentType(ct) {
+		logger.Log().Warnf("[proxy] blocking unsupported content-type %s for %s", ct, uri)
+		httpError(w, "Error: invalid request")
+		return
+	}
+
 	body, err := io.ReadAll(resp.Body)
 	if err != nil {
 		logger.Log().Warnf("[proxy] %s", err.Error())
-		httpError(w, err.Error())
+		httpError(w, "Error: invalid request")
 		return
 	}
 
 	// relay common headers
-	if resp.Header.Get("content-type") != "" {
-		w.Header().Set("content-type", resp.Header.Get("content-type"))
-	}
+	w.Header().Set("content-type", ct)
 	if resp.Header.Get("last-modified") != "" {
 		w.Header().Set("last-modified", resp.Header.Get("last-modified"))
 	}
@@ -83,7 +183,7 @@ func ProxyHandler(w http.ResponseWriter, r *http.Request) {
 		w.Header().Set("cache-control", resp.Header.Get("cache-control"))
 	}
 
-	// replace url() values with proxy address, eg: fonts & images
+	// replace CSS url() values with proxy address, eg: fonts & images
 	if strings.HasPrefix(resp.Header.Get("content-type"), "text/css") {
 		var re = regexp.MustCompile(`(?mi)(url\((\'|\")?([^\)\'\"]+)(\'|\")?\))`)
 		body = re.ReplaceAllFunc(body, func(s []byte) []byte {
@@ -100,7 +200,20 @@ func ProxyHandler(w http.ResponseWriter, r *http.Request) {
 				return []byte(parts[3])
 			}
 
-			return []byte("url(" + parts[2] + config.Webroot + "proxy?url=" + url.QueryEscape(address) + parts[4] + ")")
+			// store asset address against message ID
+			if result, ok := assets[id]; ok {
+				if !tools.InArray(address, result.Assets) {
+					assetsMutex.Lock()
+					result.Assets = append(result.Assets, address)
+					assets[id] = result
+					assetsMutex.Unlock()
+				}
+			}
+
+			// encode with base64 to handle any special characters and group message ID with URL
+			encoded := base64.StdEncoding.EncodeToString([]byte(id + ":" + address))
+
+			return []byte("url(" + parts[2] + config.Webroot + "proxy?data=" + encoded + parts[4] + ")")
 		})
 	}
 
@@ -114,7 +227,82 @@ func ProxyHandler(w http.ResponseWriter, r *http.Request) {
 	}
 }
 
-// AbsoluteURL will return a full URL regardless whether it is relative or absolute
+// GetAssets retrieves and parses the message to return linked assets.
+// Linked CSS files are appended to the assets list via the ProxyHandler when proxying CSS files.
+func getAssets(id string) ([]string, error) {
+	assetsMutex.Lock()
+	defer assetsMutex.Unlock()
+
+	result, ok := assets[id]
+	if ok {
+		// return cached assets
+		return result.Assets, nil
+	}
+
+	msg, err := storage.GetMessage(id)
+	if err != nil {
+		return nil, err
+	}
+
+	links := []string{}
+
+	reader := strings.NewReader(msg.HTML)
+
+	// load the HTML document
+	doc, err := goquery.NewDocumentFromReader(reader)
+	if err != nil {
+		return nil, err
+	}
+
+	// css & font links
+	doc.Find("link").Each(func(_ int, s *goquery.Selection) {
+		if href, exists := s.Attr("href"); exists {
+			if linkRe.MatchString(href) && !tools.InArray(href, links) {
+				links = append(links, href)
+			}
+		}
+	})
+
+	// images
+	doc.Find("img").Each(func(_ int, s *goquery.Selection) {
+		if src, exists := s.Attr("src"); exists {
+			if linkRe.MatchString(src) && !tools.InArray(src, links) {
+				links = append(links, src)
+			}
+		}
+	})
+
+	// background="<>" links
+	doc.Find("[background]").Each(func(_ int, s *goquery.Selection) {
+		if bg, exists := s.Attr("background"); exists {
+			if linkRe.MatchString(bg) && !tools.InArray(bg, links) {
+				links = append(links, bg)
+			}
+		}
+	})
+
+	// url(<>) links in style blocks
+	matches := urlRe.FindAllStringSubmatch(msg.HTML, -1)
+	for _, match := range matches {
+		if len(match) >= 3 {
+			link := match[2]
+			if linkRe.MatchString(link) && !tools.InArray(link, links) {
+				links = append(links, link)
+			}
+		}
+	}
+
+	r := MessageAssets{}
+	r.ID = id
+	r.Created = time.Now()
+	r.Assets = links
+	assets[id] = r
+
+	return links, nil
+}
+
+// AbsoluteURL will return a full URL regardless whether it is relative or absolute.
+// This is used to replace relative CSS url(...) links when proxying.
 func absoluteURL(link, baseURL string) (string, error) {
 	// scheme relative links, eg <script src="//example.com/script.js">
 	if len(link) > 1 && link[0:2] == "//" {
@@ -156,3 +344,60 @@ func httpError(w http.ResponseWriter, msg string) {
 	w.Header().Set("Content-Type", "text/plain")
 	_, _ = fmt.Fprint(w, msg)
 }
+
+// SupportedProxyContentType checks if the content-type is supported for proxying.
+// This is limited to fonts, images and css only.
+func supportedProxyContentType(ct string) bool {
+	ct = strings.ToLower(ct)
+
+	types := []string{
+		"font/otf",
+		"font/ttf",
+		"font/woff",
+		"font/woff2",
+		"image/apng",
+		"image/avif",
+		"image/bmp",
+		"image/gif",
+		"image/jpeg",
+		"image/jpg",
+		"image/png",
+		"image/tiff",
+		"image/svg+xml",
+		"image/webp",
+		"text/css",
+	}
+
+	for _, t := range types {
+		if strings.HasPrefix(ct, t) {
+			return true
+		}
+	}
+
+	return false
+}
+
+// SafeDialContext is a custom dialer that checks if the resolved IP addresses are internal before allowing the connection.
+func safeDialContext(dialer *net.Dialer) func(ctx context.Context, network, address string) (net.Conn, error) {
+	return func(ctx context.Context, network, address string) (net.Conn, error) {
+		host, port, err := net.SplitHostPort(address)
+		if err != nil {
+			return nil, err
+		}
+
+		ips, err := net.DefaultResolver.LookupIPAddr(ctx, host)
+		if err != nil {
+			return nil, err
+		}
+
+		if !config.AllowInternalHTTPRequests {
+			for _, ip := range ips {
+				if tools.IsInternalIP(ip.IP) {
+					return nil, fmt.Errorf("blocked request to %s (%s): private/reserved address", host, ip)
+				}
+			}
+		}
+
+		return dialer.DialContext(ctx, network, net.JoinHostPort(ips[0].IP.String(), port))
+	}
+}

server/server.go

@@ -32,21 +32,23 @@ import (
 )
 
 var (
-	// AccessControlAllowOrigin CORS policy
-	AccessControlAllowOrigin string
-
 	// htmlPreviewRouteRe is a regexp to match the HTML preview route
 	htmlPreviewRouteRe *regexp.Regexp
 )
 
 // Listen will start the httpd
 func Listen() {
+	setCORSOrigins()
+
 	isReady := &atomic.Value{}
 	isReady.Store(false)
 	stats.Track()
 
 	websockets.MessageHub = websockets.NewHub()
 
+	// set allowed websocket origins from configuration
+	// websockets.SetAllowedOrigins(AccessControlAllowWSOrigins)
+
 	go websockets.MessageHub.Run()
 
 	go pop3.Run()
@@ -208,7 +210,7 @@ func apiRoutes() *mux.Router {
 func basicAuthResponse(w http.ResponseWriter) {
 	w.Header().Set("WWW-Authenticate", `Basic realm="Login"`)
 	w.WriteHeader(http.StatusUnauthorized)
-	_, _ = w.Write([]byte("Unauthorised.\n"))
+	_, _ = w.Write([]byte("Unauthorized.\n"))
 }
 
 // sendAPIAuthMiddleware handles authentication specifically for the send API endpoint
@@ -287,9 +289,12 @@ func middleWareFunc(fn http.HandlerFunc) http.HandlerFunc {
 			htmlPreviewRouteRe = regexp.MustCompile(`^` + regexp.QuoteMeta(config.Webroot) + `view/[a-zA-Z0-9]+\.html$`)
 		}
 
-		if AccessControlAllowOrigin != "" &&
-			(strings.HasPrefix(r.RequestURI, config.Webroot+"api/") || htmlPreviewRouteRe.MatchString(r.RequestURI)) {
-			w.Header().Set("Access-Control-Allow-Origin", AccessControlAllowOrigin)
+		if strings.HasPrefix(r.RequestURI, config.Webroot+"api/") || htmlPreviewRouteRe.MatchString(r.RequestURI) {
+			if allowed := corsOriginAccessControl(r); !allowed {
+				http.Error(w, "Blocked to to CORS violation", http.StatusForbidden)
+				return
+			}
+			w.Header().Set("Access-Control-Allow-Origin", r.Header.Get("Origin"))
 			w.Header().Set("Access-Control-Allow-Methods", "GET, POST, DELETE, PUT, OPTIONS")
 			w.Header().Set("Access-Control-Allow-Headers", "*")
 		}
@@ -331,6 +336,12 @@ func addSlashToWebroot(w http.ResponseWriter, r *http.Request) {
 
 // Websocket to broadcast changes
 func apiWebsocket(w http.ResponseWriter, r *http.Request) {
+	if allowed := corsOriginAccessControl(r); !allowed {
+		http.Error(w, "Blocked to to CORS violation", http.StatusForbidden)
+		return
+	}
+	w.Header().Set("Access-Control-Allow-Origin", r.Header.Get("Origin"))
+	w.Header().Set("Access-Control-Allow-Headers", "*")
 	websockets.ServeWs(websockets.MessageHub, w, r)
 	storage.BroadcastMailboxStats()
 }

server/server_test.go

@@ -130,14 +130,14 @@ func TestAPIv1ToggleReadStatus(t *testing.T) {
 
 	// read first 10 IDs
 	t.Log("Get first 10 IDs")
-	putIDS := []string{}
+	putIDs := []string{}
 	for idx, msg := range m.Messages {
 		if idx == 10 {
 			break
 		}
 
 		// store for later
-		putIDS = append(putIDS, msg.ID)
+		putIDs = append(putIDs, msg.ID)
 	}
 	assertStatsEqual(t, ts.URL+"/api/v1/messages", 100, 100)
 
@@ -145,7 +145,7 @@ func TestAPIv1ToggleReadStatus(t *testing.T) {
 	t.Log("Mark first 10 as read")
 	putData := putDataStruct
 	putData.Read = true
-	putData.IDs = putIDS
+	putData.IDs = putIDs
 	j, err := json.Marshal(putData)
 	if err != nil {
 		t.Error(err.Error())

server/ui-src/assets/styles.scss

@@ -314,6 +314,11 @@ body.blur {
 	display: none;
 }
 
+// dropdown doesn't always appear in correct position inside modals
+.dropdown.form-select {
+	position: relative !important;
+}
+
 .message {
 	&.read {
 		> div {

server/ui-src/components/AppBadge.vue

@@ -53,5 +53,10 @@ export default {
 			navigator.setAppBadge(this.mailboxUnread);
 		},
 	},
+
+	render() {
+		// to remove webkit warnings about missing template or render function
+		return false;
+	},
 };
 </script>

server/ui-src/components/AppFavicon.vue

@@ -112,5 +112,10 @@ export default {
 			this.favicon.href = canvas.toDataURL("image/png");
 		},
 	},
+
+	render() {
+		// to remove webkit warnings about missing template or render function
+		return false;
+	},
 };
 </script>

server/ui-src/components/AppSettings.vue

@@ -14,6 +14,9 @@ export default {
 			timezones,
 			chaosConfig: false,
 			chaosUpdated: false,
+			defaultReleaseAddressesOptions: localStorage.getItem("defaultReleaseAddresses")
+				? JSON.parse(localStorage.getItem("defaultReleaseAddresses"))
+				: [], // set with default release addresses
 		};
 	},
 
@@ -45,11 +48,13 @@ export default {
 
 	mounted() {
 		this.setTheme();
-		this.$nextTick(() => {
-			Tags.init("select.tz");
-		});
 
-		mailbox.skipConfirmations = !!localStorage.getItem("skip-confirmations");
+		mailbox.skipConfirmations = localStorage.getItem("skip-confirmations");
+
+		window.setTimeout(() => {
+			Tags.init("select.tz");
+			Tags.init("select.default-release-addresses");
+		}, 500);
 	},
 
 	methods: {
@@ -98,7 +103,7 @@ export default {
 					<button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close"></button>
 				</div>
 				<div class="modal-body">
-					<ul v-if="mailbox.uiConfig.ChaosEnabled" id="myTab" class="nav nav-tabs" role="tablist">
+					<ul id="myTab" class="nav nav-tabs" role="tablist">
 						<li class="nav-item" role="presentation">
 							<button
 								id="ui-tab"
@@ -113,7 +118,25 @@ export default {
 								Web UI
 							</button>
 						</li>
-						<li class="nav-item" role="presentation">
+						<li
+							v-if="mailbox.uiConfig.MessageRelay && mailbox.uiConfig.MessageRelay.Enabled"
+							class="nav-item"
+							role="presentation"
+						>
+							<button
+								id="relay-tab"
+								class="nav-link"
+								data-bs-toggle="tab"
+								data-bs-target="#relay-tab-pane"
+								type="button"
+								role="tab"
+								aria-controls="relay-tab-pane"
+								aria-selected="false"
+							>
+								Message release
+							</button>
+						</li>
+						<li v-if="mailbox.uiConfig.ChaosEnabled" class="nav-item" role="presentation">
 							<button
 								id="chaos-tab"
 								class="nav-link"
@@ -234,6 +257,50 @@ export default {
 							</div>
 						</div>
 
+						<!-- Default relay addresses -->
+						<div
+							v-if="mailbox.uiConfig.MessageRelay && mailbox.uiConfig.MessageRelay.Enabled"
+							id="relay-tab-pane"
+							class="tab-pane fade"
+							role="tabpanel"
+							aria-labelledby="relay-tab"
+							tabindex="0"
+						>
+							<div class="my-3 mb-5">
+								<label class="form-label">Default release address(es)</label>
+								<div class="form-text mb-2">
+									You can designate the default "send to" addresses here, which will automatically
+									populate the field in the message release dialog. This setting applies only to your
+									browser. If this field is left empty, it will revert to the original recipients of
+									the message.
+								</div>
+								<select
+									v-model="mailbox.defaultReleaseAddresses"
+									class="form-select tag-selector default-release-addresses"
+									multiple
+									data-allow-new="true"
+									data-clear-end="true"
+									data-allow-clear="true"
+									data-placeholder="Enter email addresses..."
+									data-add-on-blur="true"
+									data-badge-style="primary"
+									data-regex='^(([^<>()[\]\\.,;:\s@"]+(\.[^<>()[\]\\.,;:\s@"]+)*)|.(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$'
+									data-separator="|,|"
+								>
+									<option value="">Enter email addresses...</option>
+									<!-- you need at least one option with the placeholder -->
+									<option
+										v-for="t in defaultReleaseAddressesOptions"
+										:key="'address+' + t"
+										:value="t"
+									>
+										{{ t }}
+									</option>
+								</select>
+								<div class="invalid-feedback">Invalid email address</div>
+							</div>
+						</div>
+
 						<div
 							v-if="mailbox.uiConfig.ChaosEnabled"
 							id="chaos-tab-pane"

server/ui-src/components/EditTags.vue

@@ -9,7 +9,7 @@ export default {
 		return {
 			mailbox,
 			editableTags: [],
-			validTagRe: /^([a-zA-Z0-9\- ._]){1,}$/,
+			validTagRe: /^([a-zA-Z0-9\- ._@]){1,100}$/,
 			tagToDelete: false,
 		};
 	},
@@ -28,7 +28,7 @@ export default {
 
 	methods: {
 		validTag(t) {
-			if (!t.after.match(/^([a-zA-Z0-9\- _.]){1,}$/)) {
+			if (!t.after.match(/^([a-zA-Z0-9\- ._@]){1,100}$/)) {
 				return false;
 			}
 

server/ui-src/components/NavMailbox.vue

@@ -89,7 +89,7 @@ export default {
 				<button
 					v-if="mailbox.skipConfirmations"
 					class="list-group-item list-group-item-action"
-					:disabled="!mailbox.messages_unread"
+					:disabled="!mailbox.unread"
 					@click="markAllRead"
 				>
 					<i class="bi bi-eye-fill me-1"></i>
@@ -100,7 +100,7 @@ export default {
 					class="list-group-item list-group-item-action"
 					data-bs-toggle="modal"
 					data-bs-target="#MarkAllReadModal"
-					:disabled="!mailbox.messages_unread"
+					:disabled="!mailbox.unread"
 				>
 					<i class="bi bi-eye-fill me-1"></i>
 					Mark all read

server/ui-src/components/NavSelected.vue

@@ -51,8 +51,7 @@ export default {
 
 		// universal handler to delete current or selected messages
 		deleteMessages() {
-			let ids = [];
-			ids = JSON.parse(JSON.stringify(mailbox.selected));
+			const ids = JSON.parse(JSON.stringify(mailbox.selected));
 			if (!ids.length) {
 				return false;
 			}

server/ui-src/components/message/MessageAttachments.vue

@@ -1,5 +1,6 @@
 <script>
 import commonMixins from "../../mixins/CommonMixins";
+import { mailbox } from "../../stores/mailbox";
 import ICAL from "ical.js";
 import dayjs from "dayjs";
 
@@ -19,6 +20,7 @@ export default {
 
 	data() {
 		return {
+			mailbox,
 			ical: false,
 		};
 	},
@@ -74,46 +76,125 @@ export default {
 </script>
 
 <template>
-	<div class="mt-4 border-top pt-4">
-		<a
+	<hr />
+
+	<button
+		class="btn btn-sm btn-outline-secondary mb-3"
+		@click="mailbox.showAttachmentDetails = !mailbox.showAttachmentDetails"
+	>
+		<i class="bi me-1" :class="mailbox.showAttachmentDetails ? 'bi-eye-slash' : 'bi-eye'"></i>
+		{{ mailbox.showAttachmentDetails ? "Hide" : "Show" }} attachment details
+	</button>
+
+	<div class="row gx-1 w-100">
+		<div
 			v-for="part in attachments"
 			:key="part.PartID"
-			:href="resolve('/api/v1/message/' + message.ID + '/part/' + part.PartID)"
-			class="card attachment float-start me-3 mb-3"
-			target="_blank"
-			style="width: 180px"
-			@click="openAttachment(part, $event)"
+			:class="mailbox.showAttachmentDetails ? 'col-12' : 'col-auto'"
 		>
-			<img
-				v-if="isImage(part)"
-				:src="resolve('/api/v1/message/' + message.ID + '/part/' + part.PartID + '/thumb')"
-				class="card-img-top"
-				alt=""
-			/>
-			<img
-				v-else
-				src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAALQAAAB4AQMAAABhKUq+AAAAA1BMVEX///+nxBvIAAAAGUlEQVQYGe3BgQAAAADDoPtTT+EA1QAAgFsLQAAB12s2WgAAAABJRU5ErkJggg=="
-				class="card-img-top"
-				alt=""
-			/>
-			<div v-if="!isImage(part)" class="icon">
-				<i class="bi" :class="attachmentIcon(part)"></i>
+			<div class="row gx-1 mb-3">
+				<div class="col-auto">
+					<a
+						:href="resolve('/api/v1/message/' + message.ID + '/part/' + part.PartID)"
+						class="card attachment float-start me-3 mb-3"
+						target="_blank"
+						style="width: 180px"
+						@click="openAttachment(part, $event)"
+					>
+						<img
+							v-if="isImage(part)"
+							:src="resolve('/api/v1/message/' + message.ID + '/part/' + part.PartID + '/thumb')"
+							class="card-img-top"
+							alt=""
+						/>
+						<img
+							v-else
+							src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAALQAAAB4AQMAAABhKUq+AAAAA1BMVEX///+nxBvIAAAAGUlEQVQYGe3BgQAAAADDoPtTT+EA1QAAgFsLQAAB12s2WgAAAABJRU5ErkJggg=="
+							class="card-img-top"
+							alt=""
+						/>
+						<div v-if="!isImage(part)" class="icon">
+							<i class="bi" :class="attachmentIcon(part)"></i>
+						</div>
+						<div class="card-body border-0">
+							<p class="mb-1">
+								<i class="bi me-1" :class="attachmentIcon(part)"></i>
+								<small>{{ getFileSize(part.Size) }}</small>
+							</p>
+							<p class="card-text mb-0 small">
+								{{ part.FileName != "" ? part.FileName : "[ unknown ]" + part.ContentType }}
+							</p>
+						</div>
+						<div class="card-footer small border-0 text-center text-truncate">
+							{{ part.FileName != "" ? part.FileName : "[ unknown ]" + part.ContentType }}
+						</div>
+					</a>
+				</div>
+				<div v-if="mailbox.showAttachmentDetails" class="col">
+					<h5 class="mb-1">
+						<a
+							:href="resolve('/api/v1/message/' + message.ID + '/part/' + part.PartID)"
+							class="me-2"
+							@click="openAttachment(part, $event)"
+						>
+							{{ part.FileName != "" ? part.FileName : "[ unknown ]" + part.ContentType }}
+						</a>
+						<small class="text-muted fw-light">
+							<small>({{ getFileSize(part.Size) }})</small>
+						</small>
+					</h5>
+					<p class="mb-1 small"><strong>Disposition</strong>: {{ part.ContentDisposition }}</p>
+					<p class="mb-2 small">
+						<strong>Content type</strong>: <code>{{ part.ContentType }}</code>
+					</p>
+					<p class="m-0 small">
+						<strong>MD5</strong>:
+						<button
+							v-if="copyToClipboardSupported"
+							class="btn btn-sm btn-link p-0"
+							title="Click to copy to clipboard"
+							@click="copyToClipboard(part.Checksums.MD5, $event)"
+						>
+							{{ part.Checksums.MD5 }}
+							<i v-if="!copiedText[part.Checksums.MD5]" class="bi bi-clipboard ms-1"></i>
+							<i v-else class="bi bi-check2-square ms-1 text-success"></i>
+						</button>
+						<code v-else>{{ part.Checksums.MD5 }}</code>
+					</p>
+					<p class="m-0 small">
+						<strong>SHA1</strong>:
+						<button
+							v-if="copyToClipboardSupported"
+							class="btn btn-link p-0"
+							title="Click to copy to clipboard"
+							@click="copyToClipboard(part.Checksums.SHA1, $event)"
+						>
+							{{ part.Checksums.SHA1 }}
+							<i v-if="!copiedText[part.Checksums.SHA1]" class="bi bi-clipboard ms-1"></i>
+							<i v-else class="bi bi-check2-square ms-1 text-success"></i>
+						</button>
+						<code v-else>{{ part.Checksums.SHA1 }}</code>
+					</p>
+					<p class="m-0 small">
+						<strong>SHA256</strong>:
+						<button
+							v-if="copyToClipboardSupported"
+							class="btn btn-sm btn-link p-0"
+							title="Click to copy to clipboard"
+							@click="copyToClipboard(part.Checksums.SHA256, $event)"
+						>
+							{{ part.Checksums.SHA256 }}
+							<i v-if="!copiedText[part.Checksums.SHA256]" class="bi bi-clipboard ms-1"></i>
+							<i v-else class="bi bi-check2-square ms-1 text-success"></i>
+						</button>
+						<code v-else>{{ part.Checksums.SHA256 }}</code>
+					</p>
+				</div>
 			</div>
-			<div class="card-body border-0">
-				<p class="mb-1">
-					<i class="bi me-1" :class="attachmentIcon(part)"></i>
-					<small>{{ getFileSize(part.Size) }}</small>
-				</p>
-				<p class="card-text mb-0 small">
-					{{ part.FileName != "" ? part.FileName : "[ unknown ]" + part.ContentType }}
-				</p>
-			</div>
-			<div class="card-footer small border-0 text-center text-truncate">
-				{{ part.FileName != "" ? part.FileName : "[ unknown ]" + part.ContentType }}
-			</div>
-		</a>
+		</div>
 	</div>
 
+	<!-- ICS Modal -->
 	<div id="ICSView" class="modal fade" tabindex="-1" aria-hidden="true">
 		<div class="modal-dialog modal-dialog-centered modal-dialog-scrollable modal-lg">
 			<div class="modal-content">

server/ui-src/components/message/MessageItem.vue

@@ -467,7 +467,7 @@ export default {
 									data-allow-clear="true"
 									data-placeholder="Add tags..."
 									data-badge-style="secondary"
-									data-regex="^([a-zA-Z0-9\-\ \_\.]){1,}$"
+									data-regex="^([a-zA-Z0-9\-\ \_\.@]){1,100}$"
 									data-separator="|,|"
 								>
 									<option value="">Type a tag...</option>

server/ui-src/components/message/MessageRelease.vue

@@ -44,7 +44,20 @@ export default {
 		// include only unique email addresses, regardless of casing
 		this.allAddresses = JSON.parse(JSON.stringify([...new Map(a.map((ad) => [ad.toLowerCase(), ad])).values()]));
 
-		this.addresses = this.allAddresses;
+		// include default release addresses from mailbox settings
+		const defaultAddr = mailbox.defaultReleaseAddresses;
+		for (const i in defaultAddr) {
+			if (!this.allAddresses.includes(defaultAddr[i])) {
+				this.allAddresses.push(defaultAddr[i]);
+			}
+		}
+
+		if (defaultAddr.length === 0) {
+			// prefill with all addresses if no default is set
+			this.addresses = this.allAddresses;
+		} else {
+			this.addresses = defaultAddr;
+		}
 	},
 
 	methods: {
@@ -140,6 +153,13 @@ export default {
 								<option v-for="t in allAddresses" :key="'address+' + t" :value="t">{{ t }}</option>
 							</select>
 							<div class="invalid-feedback">Invalid email address</div>
+							<div class="form-text mt-1">
+								Default release addresses can be configured in
+								<a href="#" data-bs-toggle="modal" data-bs-target="#SettingsModal">
+									<i class="bi bi-gear-fill ms-1"></i>
+									Settings </a
+								>.
+							</div>
 						</div>
 					</div>
 					<div class="row mb-3">

server/ui-src/components/message/MessageScreenshot.vue

@@ -27,9 +27,13 @@ export default {
 	methods: {
 		initScreenshot() {
 			this.loading = 1;
+			const baseUrl = `${location.protocol}//${location.host}/`;
+			// absolute proxy URL
+			const proxy = new URL(this.resolve("/proxy"), baseUrl).href;
+			const urlRegex = /(url\(('|")?(https?:\/\/[^)'"]+)('|")?\))/gim;
+
 			// remove base tag, if set
 			let h = this.message.HTML.replace(/<base .*>/im, "");
-			const proxy = this.resolve("/proxy");
 
 			// Outlook hacks - else screenshot returns blank image
 			h = h.replace(/<html [^>]+>/gim, "<html>"); // remove html attributes
@@ -37,19 +41,10 @@ export default {
 			h = h.replace(/<o:/gm, "<"); // replace `<o:p>` tags with `<p>`
 			h = h.replace(/<\/o:/gm, "</"); // replace `</o:p>` tags with `</p>`
 
-			// update any inline `url(...)` absolute links
-			const urlRegex = /(url\(('|")?(https?:\/\/[^)'"]+)('|")?\))/gim;
-			h = h.replaceAll(urlRegex, (match, p1, p2, p3) => {
-				if (typeof p2 === "string") {
-					return `url(${p2}${proxy}?url=` + encodeURIComponent(this.decodeEntities(p3)) + `${p2})`;
-				}
-				return `url(${proxy}?url=` + encodeURIComponent(this.decodeEntities(p3)) + `)`;
-			});
-
 			// create temporary document to manipulate
 			const doc = document.implementation.createHTMLDocument();
 			doc.open();
-			doc.write(h);
+			doc.writeln(h);
 			doc.close();
 
 			// remove any <script> tags
@@ -58,17 +53,30 @@ export default {
 				i.parentNode.removeChild(i);
 			}
 
+			// replace any url(...) links in <style> blocks
+			const styles = doc.getElementsByTagName("style");
+			for (const i of styles) {
+				i.innerHTML = i.innerHTML.replaceAll(urlRegex, (match, p1, p2, p3) => {
+					if (typeof p2 === "string") {
+						// quoted URL
+						return (
+							`url(${p2}${proxy}?data=` + btoa(this.message.ID + ":" + this.decodeEntities(p3)) + `${p2})`
+						);
+					}
+					return `url(${proxy}?data=` + btoa(this.message.ID + ":" + this.decodeEntities(p3)) + `)`;
+				});
+			}
+
 			// replace stylesheet links with proxy links
 			const stylesheets = doc.getElementsByTagName("link");
 			for (const i of stylesheets) {
 				const src = i.getAttribute("href");
-
 				if (
 					src &&
 					src.match(/^https?:\/\//i) &&
 					src.indexOf(window.location.origin + window.location.pathname) !== 0
 				) {
-					i.setAttribute("href", `${proxy}?url=` + encodeURIComponent(this.decodeEntities(src)));
+					i.setAttribute("href", `${proxy}?data=` + btoa(this.message.ID + ":" + this.decodeEntities(src)));
 				}
 			}
 
@@ -81,7 +89,7 @@ export default {
 					src.match(/^https?:\/\//i) &&
 					src.indexOf(window.location.origin + window.location.pathname) !== 0
 				) {
-					i.setAttribute("src", `${proxy}?url=` + encodeURIComponent(this.decodeEntities(src)));
+					i.setAttribute("src", `${proxy}?data=` + btoa(this.message.ID + ":" + this.decodeEntities(src)));
 				}
 			}
 
@@ -96,7 +104,10 @@ export default {
 					src.indexOf(window.location.origin + window.location.pathname) !== 0
 				) {
 					// replace with proxy link
-					i.setAttribute("background", `${proxy}?url=` + encodeURIComponent(this.decodeEntities(src)));
+					i.setAttribute(
+						"background",
+						`${proxy}?data=` + btoa(this.message.ID + ":" + this.decodeEntities(src)),
+					);
 				}
 			}
 

server/ui-src/mixins/CommonMixins.js

@@ -20,9 +20,16 @@ export default {
 		return {
 			loading: 0,
 			tagColorCache: {},
+			copiedText: {}, // used for clipboard copy feedback
 		};
 	},
 
+	computed: {
+		copyToClipboardSupported() {
+			return !!navigator.clipboard;
+		},
+	},
+
 	methods: {
 		resolve(u) {
 			return this.$router.resolve(u).href;
@@ -222,12 +229,15 @@ export default {
 		allAttachments(message) {
 			const a = [];
 			for (const i in message.Attachments) {
+				message.Attachments[i].ContentDisposition = "Attachment";
 				a.push(message.Attachments[i]);
 			}
 			for (const i in message.OtherParts) {
+				message.OtherParts[i].ContentDisposition = "Other";
 				a.push(message.OtherParts[i]);
 			}
 			for (const i in message.Inline) {
+				message.Inline[i].ContentDisposition = "Inline";
 				a.push(message.Inline[i]);
 			}
 
@@ -288,5 +298,21 @@ export default {
 
 			return this.tagColorCache[s];
 		},
+
+		// Copy to clipboard functionality
+		copyToClipboard(text) {
+			navigator.clipboard.writeText(text).then(
+				() => {
+					this.copiedText[text] = true;
+					setTimeout(() => {
+						delete this.copiedText[text];
+					}, 2000);
+				},
+				() => {
+					// failure
+					alert("Failed to copy to clipboard");
+				},
+			);
+		},
 	},
 };

server/ui-src/stores/mailbox.js

@@ -20,6 +20,9 @@ export const mailbox = reactive({
 	appInfo: {}, // application information
 	uiConfig: {}, // configuration for UI
 	lastMessage: false, // return scrolling
+	defaultReleaseAddresses: localStorage.getItem("defaultReleaseAddresses")
+		? JSON.parse(localStorage.getItem("defaultReleaseAddresses"))
+		: [], // default release addresses for released messages
 
 	// settings
 	showTagColors: !localStorage.getItem("hideTagColors"),
@@ -29,6 +32,7 @@ export const mailbox = reactive({
 	timeZone: localStorage.getItem("timeZone")
 		? localStorage.getItem("timeZone")
 		: Intl.DateTimeFormat().resolvedOptions().timeZone,
+	showAttachmentDetails: localStorage.getItem("showAttachmentDetails"), // show attachment details
 });
 
 watch(
@@ -82,6 +86,17 @@ watch(
 	},
 );
 
+watch(
+	() => mailbox.defaultReleaseAddresses,
+	(v) => {
+		if (v.length) {
+			localStorage.setItem("defaultReleaseAddresses", JSON.stringify(v));
+		} else {
+			localStorage.removeItem("defaultReleaseAddresses");
+		}
+	},
+);
+
 watch(
 	() => mailbox.timeZone,
 	(v) => {
@@ -92,3 +107,14 @@ watch(
 		}
 	},
 );
+
+watch(
+	() => mailbox.showAttachmentDetails,
+	(v) => {
+		if (v) {
+			localStorage.setItem("showAttachmentDetails", "1");
+		} else {
+			localStorage.removeItem("showAttachmentDetails");
+		}
+	},
+);

server/ui-src/views/MessageView.vue

@@ -28,6 +28,7 @@ export default {
 			mailbox,
 			pagination,
 			message: false,
+			loadReleaseModal: false,
 			errorMessage: false,
 			apiSideNavURI: false,
 			apiSideNavParams: URLSearchParams,
@@ -442,7 +443,11 @@ export default {
 				if (pagination.limit !== pagination.defaultLimit) {
 					p.limit = pagination.limit.toString();
 				}
-				this.$router.push("/?" + new URLSearchParams(p).toString());
+				if (p.start || p.limit) {
+					this.$router.push("/?" + new URLSearchParams(p).toString());
+				} else {
+					this.$router.push("/");
+				}
 			}
 		},
 
@@ -451,12 +456,18 @@ export default {
 		},
 
 		initReleaseModal() {
-			this.modal("ReleaseModal").show();
-			window.setTimeout(() => {
-				// delay to allow elements to load / focus
-				this.$refs.ReleaseRef.initTags();
-				document.querySelector('#ReleaseModal input[role="combobox"]').focus();
-			}, 500);
+			// reset releaseMessage to force re-render so default release addresses can be included
+			this.loadReleaseModal = false;
+			this.$nextTick(() => {
+				this.loadReleaseModal = true;
+				this.$nextTick(() => {
+					this.modal("ReleaseModal").show();
+					window.setTimeout(() => {
+						// delay to allow elements to load / focus
+						this.$refs.ReleaseRef.initTags();
+					}, 250);
+				});
+			});
 		},
 	},
 };
@@ -707,7 +718,7 @@ export default {
 	<AboutMailpit modals />
 	<AjaxLoader :loading="loading" />
 	<Release
-		v-if="mailbox.uiConfig.MessageRelay && message"
+		v-if="mailbox.uiConfig.MessageRelay && loadReleaseModal"
 		ref="ReleaseRef"
 		:message="message"
 		@delete="deleteMessage"

server/ui/api/v1/swagger.json

@@ -1345,9 +1345,27 @@
       "x-go-package": "github.com/axllent/mailpit/internal/stats"
     },
     "Attachment": {
-      "description": "Attachment struct for inline and attachments",
+      "description": "Attachment struct for inline images and attachments",
       "type": "object",
       "properties": {
+        "Checksums": {
+          "description": "File checksums",
+          "type": "object",
+          "properties": {
+            "MD5": {
+              "description": "MD5 checksum hash of file",
+              "type": "string"
+            },
+            "SHA1": {
+              "description": "SHA1 checksum hash of file",
+              "type": "string"
+            },
+            "SHA256": {
+              "description": "SHA256 checksum hash of file",
+              "type": "string"
+            }
+          }
+        },
         "ContentID": {
           "description": "Content ID",
           "type": "string"

server/webhook/webhook.go

@@ -16,6 +16,10 @@ var (
 	// RateLimit is the minimum number of seconds between requests
 	RateLimit = 1
 
+	// Delay is the number of seconds to wait before sending each webhook request
+	// This can  allow for other processing to complete before the webhook is triggered.
+	Delay = 0
+
 	rl rate.Sometimes
 
 	rateLimiterSet bool
@@ -38,6 +42,11 @@ func Send(msg any) {
 	}
 
 	go func() {
+		// Apply delay if configured
+		if Delay > 0 {
+			time.Sleep(time.Duration(Delay) * time.Second)
+		}
+
 		rl.Do(func() {
 			b, err := json.Marshal(msg)
 			if err != nil {

server/websockets/client.go

@@ -34,8 +34,11 @@ var (
 var upgrader = websocket.Upgrader{
 	ReadBufferSize:    1024,
 	WriteBufferSize:   1024,
-	CheckOrigin:       func(r *http.Request) bool { return true }, // allow multi-domain
-	EnableCompression: true,                                       // experimental compression
+	EnableCompression: true,
+	CheckOrigin: func(_ *http.Request) bool {
+		// origin is checked via server.go's CORS settings
+		return true
+	},
 }
 
 // Client is a middleman between the websocket connection and the hub.
@@ -144,5 +147,5 @@ func ServeWs(hub *Hub, w http.ResponseWriter, r *http.Request) {
 func basicAuthResponse(w http.ResponseWriter) {
 	w.Header().Set("WWW-Authenticate", `Basic realm="Login"`)
 	w.WriteHeader(http.StatusUnauthorized)
-	_, _ = w.Write([]byte("Unauthorised.\n"))
+	_, _ = w.Write([]byte("Unauthorized.\n"))
 }