[BlueOnyx:20217] Re: POP authentication error on one network

[Michael Stauber]

Hi Lewis,

> Any ideas on what to do. They are using Roundcube now but the complaints
> are audible from quite a distance.

A couple of things come to mind here:

As Chris said: This could be a PAM_ABL problem. Either the IP is
blocked, or the PAM_ABL database is corrupted.

The easiest way to clean that up from the command line is this command
(as "root"):

rm /var/lib/pam_abl/*.db

That will delete the 1-2 PAM_ABL databases that might be there. They
will get recreated eventually, so you can delete them w/o worries.

The other possible issue is that one of the Dovecot processes has gotten
"stuck". This is best solved by restarting Dovecot:

/sbin/service dovecot restart

Or on 5209R:

systemctl restart dovecot

If it fails to restart cleanly, then this indicates that there are hung
dovecot processes. This can be fixed by a reboot or - preferably -
killing off an processes in the process list ("ps axf") related to
dovecot. Once they're dead, the restart of the Dovecot service should
work again.

-- 
With best regards

Michael Stauber