[Dovecot][Netfilter] Fix dovecot failed login regex #6309
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Contribution Guidelines
What does this PR include?
Short Description
Fixes #6308
Dovecot allows multiple authentication attempts within a single IMAP session.
Netfilter only registers a failed login when the session is closed, leading to missed failed attempts.
This Fix requires Admins to reset Fail2ban regex in mailcow UI after update.
Affected Containers
Did you run tests?
What did you tested?
Attempted multiple failed logins within a single IMAP session.
What were the final results? (Awaited, got)
Verified that each failed attempt is now properly detected by Netfilter and the correct IP is extracted.