I’ve been meaning to set up SMTP, IMAP and POP3 access over SSL to my mail servers for quite a long time and the other day I just sat down and did it, it’s actually pretty easy once you know how. I use Debian, Exim and Courier IMAP/POP3 on my servers, so for the most part, I was able to glue things together from a few tutorials and the CA Cert wiki. I used SSL certificates from CA Cert as I’m non-commercial and generally, I’m my only user.

In any case, I wrote it up here on my wiki so you can do it too. I hope you find it useful.