We provide remote upgrade service, check the price and contact us.
/etc/fail2ban/filters.d/postfix.iredmail.conf
or
/usr/local/etc/fail2ban/filters.d/postfix.iredmail.conf
(on FreeBSD), find
below line under [Definition]
section: lost connection after AUTH from (.*)\[<HOST>\]
Update above line to below one:
lost connection after (AUTH|UNKNOWN|EHLO) from (.*)\[<HOST>\]
Restarting Fail2ban service is required.
Document published under a CC BY-ND 3.0 license. If you found something wrong, please do contact us to fix it.