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fail2ban/config/filter.d/postfix-rbl.conf

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# Fail2Ban filter for Postfix's RBL based Blocked hosts
#
#
[INCLUDES]
# Read common prefixes. If any customizations available -- read them from
# common.local
before = common.conf
[Definition]
_daemon = postfix(-\w+)?/smtpd
failregex = ^%(__prefix_line)sNOQUEUE: reject: RCPT from \S+\[<HOST>\]: 454 4\.7\.1 Service unavailable; Client host \[\S+\] blocked using .* from=<\S*> to=<\S+> proto=ESMTP helo=<\S*>$
ignoreregex =
# Author: Lee Clemens
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