fail2ban/config/filter.d/sieve.conf

# Fail2Ban configuration file
#
# Author: Jan Wagner <waja@cyconet.org>
#
#

[Definition]

# Option: failregex
# Notes.: regex to match the password failures messages in the logfile. The
#          host must be matched by a group named "host". The tag "<HOST>" can
#          be used for standard IP/hostname matching.
# Values: TEXT
#
failregex = : badlogin: .*\[<HOST>\] (?:LOGIN|PLAIN|(?:CRAM|DIGEST)-MD5) authentication failure$

# Option:  ignoreregex
# Notes.:  regex to ignore. If this regex matches, the line is ignored.
# Values:  TEXT
#
ignoreregex =