There is a good Ubuntu guide on settings up a Virtual mail server with a MySQL backend.
IÂ have ordered a SSL certificate from ServerTastic cheap at $12 p/y, has some good instructions.
UPDATE: I’ve installed my Certificate and its working well, i’ve used it for the following services.
- Apache SSL Mod – https
- Courier – imaps & pop3s
- Postfix – smtp tls
I must say i’m happy with the ease of getting the certificate and the installation.