Joe i havea an update this morning…this may be of help to you guys in fixing this issue.
When i woke up, again the dovecot status monitor and server monitor in virtualmin were saying davecot is not running.
i went into command shell and enterred systemctl status dovecot (and also dovecot.service).
Dovecot IMAP/POP3 email server
Loaded: loaded (/lib/systemd/system/dovecot.service; enabled; vendor preset: enabled)
Active: failed (Result: exit-code) since Thu 2020-05-21 01:19:34 AEST; 5h 35min ago
Docs: man:dovecot(1)
http://wiki2.dovecot.org/
Process: 26345 ExecStop=/usr/bin/doveadm stop (code=exited, status=75)
Process: 579 ExecStart=/usr/sbin/dovecot (code=exited, status=0/SUCCESS)
Main PID: 719 (code=exited, status=0/SUCCESS)
All 3 of the usual methods of system monitoring say that dovecot and dovecot service have enterred a failed state. However, the email delivery is still being completed. I logged into 3 client accounts in usermin and the email to these accounts via dovecot is still being delivered.
I have checked to see if email client apps such as outlook are able to connect with the server, at least the one for my own email account on one of the virtual servers is receiving and sending emails successfully…i cant be sure about my clients own ones on their computers and mobile phones
So my questions
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is dovecot running or not?
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If it is, how can command shell and virtualmin both be saying dovecot is not running when it clearly is still delivering mail?
Are you sure that this problem isnt something to do with resources or limits that are set in dovecot when virtualmin is installed using the installer? Is there a way i can increase the limits that pertain to login/login error i am seeing all the time?