How to count / determine the exact amount of messages in a Postfix mail queue
How do I count the message in Postfix’s mail queue? I’m not really interested in all these posts on the internet that outputs the queue.
SSL error: No path found from the leaf certificate to any root
Before you used Gmail to retrieve your email from a Virtualmin server. It suddenly stops working and you see this error in Gmail: SSL Security
dovecot: pop3-login: Fatal: Dovecot version mismatch: Master is v2.3.2, pop3-login is v2.3.2.1 (if you don’t care, set version_ignore=yes)
Whilst running a Dovecot system, you might experience the following error in your log file: Jul 13 09:25:02 hostname dovecot: pop3-login: Fatal: Dovecot version mismatch: