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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.localbefore = 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_info)sdropped: too many nonmail commands \(last was "\S+"\)\s*$^%(pid)s SMTP protocol error in "AUTH \S*(?: \S*)?" %(host_info)sAUTH command used when not advertised\s*$^%(pid)s no MAIL in SMTP connection from (?:\S* )?(?:\(\S*\) )?%(host_info)sD=\d+s(?: C=\S*)?\s*$^%(pid)s \S+ SMTP connection from (?:\S* )?(?:\(\S*\) )?%(host_info)sclosed by DROP in ACL\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)# Martin O'Neal (added additional regexs to detect authentication failures, protocol errors, and drops)