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Test: Add SMTP tests for address compliancy (RFC 5322) and header injection

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This commit is contained in:
Ralph Slooten
2026-01-15 12:02:56 +13:00
parent 36cc06c125
commit 050da038af
1 changed files with 21 additions and 0 deletions
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21
internal/smtpd/smtpd_test.go
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@@ -104,6 +104,16 @@ 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:<recipientexample.com>", "501")
cmdCode(t, conn, "RCPT TO: <recipientexample.com>", "501")
cmdCode(t, conn, "RCPT TO: <recipientexample.com>", "501")
cmdCode(t, conn, "RCPT TO:<recipient\rexample.com>", "501")
cmdCode(t, conn, "RCPT TO: <recipient\rexample.com>", "501")
cmdCode(t, conn, "RCPT TO: <recipient\rexample.com>", "501")
cmdCode(t, conn, "RCPT TO: <>", "501") // empty address not allowed here
cmdCode(t, conn, "EHLO host.example.com", "250")
cmdCode(t, conn, "DATA", "503")
@@ -145,6 +155,17 @@ 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:<sender\rexample.com>", "501")
cmdCode(t, conn, "MAIL FROM: <sender\rexample.com>", "501")
cmdCode(t, conn, "MAIL FROM: <sender\rexample.com>", "501")
cmdCode(t, conn, "MAIL FROM:<senderexample.com>", "501")
cmdCode(t, conn, "MAIL FROM: <senderexample.com>", "501")
cmdCode(t, conn, "MAIL FROM: <senderexample.com>", "501")
cmdCode(t, conn, "MAIL FROM: < sender@example.com >", "501")
cmdCode(t, conn, "MAIL FROM: < sender@example.com>", "501")
cmdCode(t, conn, "MAIL FROM: <sender@example.com >", "501")
// MAIL with valid SIZE parameter should return 250 Ok
cmdCode(t, conn, "MAIL FROM:<sender@example.com> SIZE=1000", "250")