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postfix: ETRN discarded from EHLO silently

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After the 2.14.4 rollout the test server's mail.log held "discarding EHLO
keywords: ETRN" for every connection on every port: smtpd logs a discard
unless the mask has EHLO_MASK_SILENT (Postfix 3.10.13, src/smtpd/smtpd.c:2016;
src/global/ehlo_mask.c:88 "SILENT-DISCARD"; postconf(5)
smtpd_discard_ehlo_keywords, "Specify the silent-discard pseudo keyword to
prevent this action from being logged"). smtpd_discard_ehlo_keywords is now
silent-discard,etrn; ETRN is still refused (smtpd_etrn_restrictions=reject)
and still not offered.

make e2e (64 passed; checkPostfixHardening reads the value back,
testInboundRelay still sees no ETRN in EHLO and 554) and go vet + go test
(26 packages) on the test server for this tree.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
mix
2026-10-18 01:01:41 +03:00
co-authored by Claude Opus 5.5
parent 58356fb4d4
commit 8eec6728d4
4 changed files with 14 additions and 4 deletions
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test/e2e/process_check.go
+1 -1
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@@ -168,7 +168,7 @@ func checkPostfixHardening(s *stack) error {
return fmt.Errorf("postconf: %v\n%s", err, out)
}
got := strings.Split(strings.TrimSpace(out), "\n")
want := []string{">=TLSv1.2", ">=TLSv1.2", "yes", "$myhostname ESMTP", "reject", "etrn"}
want := []string{">=TLSv1.2", ">=TLSv1.2", "yes", "$myhostname ESMTP", "reject", "silent-discard,etrn"}
if strings.Join(got, "|") != strings.Join(want, "|") {
return fmt.Errorf("postconf -h of the hardened settings = %q, want %q", got, want)
}