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filter.d/postfix.conf: add Sender address rejected: Malformed DNS server reply #3590

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merged 4 commits into from
Mar 19, 2024
Merged

filter.d/postfix.conf: add Sender address rejected: Malformed DNS server reply #3590

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248f5fc
add Sender address rejected: Malformed DNS server reply
sharewax Oct 3, 2023
ab5a68d
Merge branch 'master' into patch-1
sharewax Jan 30, 2024
8e5fdb2
add tests for this pr.
sharewax Mar 19, 2024
ef999cc
Merge branch 'fail2ban:master' into patch-1
sharewax Mar 19, 2024
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2 changes: 1 addition & 1 deletion config/filter.d/postfix.conf
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Original file line number Diff line number Diff line change
Expand Up @@ -20,7 +20,7 @@ prefregex = ^%(__prefix_line)s<mdpr-<mode>> <F-CONTENT>.+</F-CONTENT>$
exre-user = |[Uu](?:ser unknown|ndeliverable address) ; pragma: codespell-ignore

mdpr-normal = (?:\w+: (?:milter-)?reject:|(?:improper command pipelining|too many errors) after \S+)
mdre-normal=^%(_pref)s from [^[]*\[<HOST>\]%(_port)s: [45][50][04] [45]\.\d\.\d+ (?:(?:<[^>]*>)?: )?(?:(?:Helo command|(?:Sender|Recipient) address) rejected: )?(?:Service unavailable|Access denied|(?:Client host|Command|Data command) rejected|Relay access denied|(?:Host|Domain) not found|need fully-qualified hostname|match%(exre-user)s)\b
mdre-normal=^%(_pref)s from [^[]*\[<HOST>\]%(_port)s: [45][50][04] [45]\.\d\.\d+ (?:(?:<[^>]*>)?: )?(?:(?:Helo command|(?:Sender|Recipient) address) rejected: )?(?:Service unavailable|Access denied|(?:Client host|Command|Data command) rejected|Relay access denied|Malformed DNS server reply|(?:Host|Domain) not found|need fully-qualified hostname|match%(exre-user)s)\b
^from [^[]*\[<HOST>\]%(_port)s:?

mdpr-auth = warning:
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2 changes: 2 additions & 0 deletions fail2ban/tests/files/logs/postfix
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Expand Up @@ -12,6 +12,8 @@ Jul 18 23:12:56 xxx postfix/smtpd[8738]: NOQUEUE: reject: RCPT from foo[192.51.1
Jul 18 23:12:56 xxx postfix/smtpd[1938]: NOQUEUE: reject: RCPT from unknown[192.0.2.236]: 554 5.7.1 <dom.tld>: Helo command rejected: Access denied; from=<ADMINISTRATOR@dom.tld> to=<lp@dom.tld> proto=ESMTP helo=<dom.tld>
# failJSON: { "time": "2005-07-18T23:12:56", "match": true , "host": "192.51.100.43" }
Jul 18 23:12:56 xxx postfix/smtpd[8738]: NOQUEUE: reject: RCPT from foo[192.51.100.43]: 554 5.7.1 <foo@bad.domain>: Sender address rejected: match bad.domain; from=<foo@bad.domain> to=<foo@porcupine.org> proto=SMTP helo=<192.51.100.43>
# failJSON: { "time": "2005-07-18T23:12:57", "match": true , "host": "192.51.100.143", "desc": "gh-3590" }
Jul 18 23:12:57 xxx postfix/smtpd[8722]: NOQUEUE: reject: RCPT from foo[192.51.100.143]: 450 4.1.8 <foo@bad.domain>: Sender address rejected: Malformed DNS server reply; from=<foo@bad.domain> to=<foo@porcupine.org> proto=SMTP helo=<192.51.100.143>
# failJSON: { "time": "2005-08-10T10:55:38", "match": true , "host": "72.53.132.234" }
Aug 10 10:55:38 f-vanier-bourgeois postfix/smtpd[2162]: NOQUEUE: reject: VRFY from 72-53-132-234.cpe.distributel.net[72.53.132.234]: 550 5.1.1 : Recipient address rejected: User unknown in local recipient tab
# failJSON: { "time": "2005-08-13T15:45:46", "match": true , "host": "192.0.2.1" }
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