Jono has given up on trying to configure IMAP on his server.
Yesterday I spent most of the day fighting off and on with Exim and Courier-IMAP on my Debian server. I was trying to configure Exim for virtual domains (mapped to real users) and I followed tutorial after tutorial after tutorial, and all of the ended up with same result – no inbound mail.
Eventually I gave up and switched to Postfix and Dovecot – the combination I used to use under FC1. In less than 10 minutes I was up & receiving mail correctly.
I initially went with Exim and Courier mainly because they (at the least Exim) is default on Debian, and hence (supposedly) easier.
Although I like Ubuntu and Debian, I’m now evaluating alternatives that should fit my needs (i.e. Mono) better. Watch this space.