I got a call last week from a client that was having some issues with retrieving email from a Dovecot IMAP server. The client was connecting over TLS and was using an Apple mail client. Upon checking the mailserver log, I was greeted with a flood of rather vicious looking errors. I’m not gonna post the entire backtrace since its rather long, but you’ll get the idea.

After installing a new wildcard SSL certificate on a BlueOnyx 5106R server, I performed the mandatory system tasks to spot any potential problems. Unfortunately the system was rapidly throwing the following error messages: