[nwh]

I'm more curious what the author uses for his self-hosted email. None of the IMAP servers I've seen so far are particularly stellar.

[tacoman]

I use Dovecot. I can't tell you much about it though because all I've ever had to do was point it my own SSL cert and turn off not non-encrypted connections. I use it with BlackBerry, Android, iOS and Thunderbird.

[X-Istence]

Third comment, but it bears repeating. Dovecot.

I use it with Postfix, using Dovecot's virtual domain support to host various domains/mailboxes. Dovecot with sieve sorts mail server side. It's fast and works incredibly well.

[nwh]

I like sieve. A lot.

[quesera]

Have you tried Dovecot?