Build a Secure Webmail Service Supporting IMAP and SSL (Linux Journal)
This article describes how you can set up your Linux computer to be a web-based e-mail system for yourself or a group of friends. It will work best, of course, if you are on a dedicated internet connection, like a cable modem or a DSL line at home. This will provide you with a secure method to check your e-mail from remote locations without having to add insecure connection methods that could be used by an attacker. While your friends and coworkers complain about their free web based e-mail system being inaccessible, yours will be humming along."