Difference between revisions of "Postfix"

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'''Postfix''' is a free software / open source mail transfer agent (MTA), a computer program for the routing and delivery of email. It is intended as a fast, easy-to-administer, and secure alternative to the widely-used Sendmail MTA.
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{{Source|From Wikipedia, the free encyclopedia}}
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{{Logging_Outputs}}
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<div style="padding: 1em;border: 1px dashed #2f6fab;color: black;background-color: #f9f9f9;line-height: 1.1em;">
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Postfix 2.3.8 - Dovecot SASL
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* Jan 25 08:16:05 emailserver postfix/smtpd[17764]: NOQUEUE: reject: RCPT from gate.abc.com[192.0.2.1]: 550 5.1.1 <OID.Admin@example.org>: Recipient address rejected: User unknown in local recipient table; from=<sillyperson@abc.com> to=<OID.Admin@example.org> proto=ESMTP helo=<gate.example.com>
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* Jan  7 11:36:41 emailserver postfix/smtpd[13688]: warning: passwordhacker.abc.com[192.0.2.19]: SASL PLAIN authentication failed:
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</div>
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{{Failregex}}
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<pre>
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failregex = reject: RCPT from (.*)\[<HOST>\]: 550 5.1.1
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            reject: RCPT from (.*)\[<HOST>\]: 450 4.7.1
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            reject: RCPT from (.*)\[<HOST>\]: 554 5.7.1
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</pre>
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[[Category:MTA]]

Latest revision as of 16:32, 10 March 2009

Postfix is a free software / open source mail transfer agent (MTA), a computer program for the routing and delivery of email. It is intended as a fast, easy-to-administer, and secure alternative to the widely-used Sendmail MTA.

From Wikipedia, the free encyclopedia



Postfix 2.3.8 - Dovecot SASL

  • Jan 25 08:16:05 emailserver postfix/smtpd[17764]: NOQUEUE: reject: RCPT from gate.abc.com[192.0.2.1]: 550 5.1.1 <OID.Admin@example.org>: Recipient address rejected: User unknown in local recipient table; from=<sillyperson@abc.com> to=<OID.Admin@example.org> proto=ESMTP helo=<gate.example.com>
  • Jan 7 11:36:41 emailserver postfix/smtpd[13688]: warning: passwordhacker.abc.com[192.0.2.19]: SASL PLAIN authentication failed:


Failregex

The regular expressions below are proposed failregex for this software. Multiple regular expressions for failregex will only work with a version of Fail2ban greater than or equal to 0.7.6.

The tag <HOST> in the regular expressions below is just an alias for (?:::f{4,6}:)?(?P<host>\S+). The replacement is done automatically by Fail2ban when adding the regular expression. At the moment, exactly one named group host or <HOST> tag must be present in each regular expression.

Please, before editing this section, propose your changes in the discussion page first.


failregex = reject: RCPT from (.*)\[<HOST>\]: 550 5.1.1
            reject: RCPT from (.*)\[<HOST>\]: 450 4.7.1
            reject: RCPT from (.*)\[<HOST>\]: 554 5.7.1