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# Fail2Ban filter for exim
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#
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# This includes the rejection messages of exim. For spam and filter
# related bans use the exim-spam.conf
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#
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[INCLUDES]
# Read common prefixes. If any customizations available -- read them from
# exim-common.local
before = exim-common.conf
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[Definition]
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failregex = ^%(pid)s %(host_info)ssender verify fail for <\S+>: (?:Unknown user|Unrouteable address|all relevant MX records point to non-existent hosts)\s*$
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^%(pid)s \w+ authenticator failed for (\S+ )?\(\S+\) \[<HOST>\]: 535 Incorrect authentication data( \(set_id=.*\)|: \d+ Time\(s\))?\s*$
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^%(pid)s %(host_info)sF=(<>|[^@]+@\S+) rejected RCPT [^@]+@\S+: (relay not permitted|Sender verify failed|Unknown user)\s*$
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^%(pid)s SMTP protocol synchronization error \([^)]*\): rejected (connection from|"\S+") %(host_info)s(next )?input=".*"\s*$
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^%(pid)s SMTP call from \S+ \[<HOST>\](:\d+)? (I=\[\S+\]:\d+ )?dropped: too many nonmail commands \(last was "\S+"\)\s*$
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ignoreregex =
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# DEV Notes:
# The %(host_info) defination contains a <HOST> match
#
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# SMTP protocol synchronization error \([^)]*\) <- This needs to be non-greedy
# to void capture beyond ")" to avoid a DoS Injection vulnerabilty as input= is
# user injectable data.
#
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# Author: Cyril Jaquier
# Daniel Black (rewrote with strong regexs)
