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# Fail2Ban filter for exim
#
# This includes the rejection messages of exim. For spam and filter
# related bans use the exim-spam.conf
#


[INCLUDES]

# Read common prefixes. If any customizations available -- read them from
# exim-common.local
before = exim-common.conf

[Definition]

failregex = ^%(pid)s %(host_info)ssender verify fail for <\S+>: (?:Unknown user|Unrouteable address|all relevant MX records point to non-existent hosts)\s*$
             ^%(pid)s \w+ authenticator failed for (\S+ )?\(\S+\) \[<HOST>\](:\d+)?( I=\[\S+\](:\d+)?)?: 535 Incorrect authentication data( \(set_id=.*\)|: \d+ Time\(s\))?\s*$
             ^%(pid)s %(host_info)sF=(<>|[^@]+@\S+) rejected RCPT [^@]+@\S+: (relay not permitted|Sender verify failed|Unknown user)\s*$
             ^%(pid)s SMTP protocol synchronization error \([^)]*\): rejected (connection from|"\S+") %(host_info)s(next )?input=".*"\s*$
             ^%(pid)s SMTP call from \S+ \[<HOST>\](:\d+)? (I=\[\S+\](:\d+)? )?dropped: too many nonmail commands \(last was "\S+"\)\s*$

ignoreregex = 

# DEV Notes:
# The %(host_info) defination contains a <HOST> match
#
# 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.
#
# Author: Cyril Jaquier
#         Daniel Black (rewrote with strong regexs)