# Fail2Ban filter for selected Postfix SMTP rejections
#
#

[INCLUDES]

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

[Definition]

_daemon = postfix/smtpd

failregex = ^%(__prefix_line)sNOQUEUE: reject: RCPT from \S+\[<HOST>\]: 554 5\.7\.1 .*$
            ^%(__prefix_line)sNOQUEUE: reject: RCPT from \S+\[<HOST>\]: 554 5\.5\.2 .*$
            ^%(__prefix_line)sNOQUEUE: reject: RCPT from \S+\[<HOST>\]: 450 4\.7\.1 : Helo command rejected: Host not found; from=<> to=<> proto=ESMTP helo= *$
            ^%(__prefix_line)s\S+\: reject: RCPT from \S+\[<HOST>\]: 550 5\.1\.1 <\S*>: Recipient address rejected:.*$
            ^%(__prefix_line)sNOQUEUE: reject: RCPT from \S+\[<HOST>\]: 454 4\.7\.1 <\S*>: Relay access denied;.*$
            ^%(__prefix_line)swarning: \S+\[<HOST>\]: SASL LOGIN authentication failed: Invalid authentication mechanism$
            ^%(__prefix_line)swarning: Recipient address rate limit exceeded: \S+\ from unknown\[<HOST>\] for service smtp$

ignoreregex =

[Init]

journalmatch = _SYSTEMD_UNIT=postfix@-.service