I've hosted my own email for 6+ years now. It's a useful skill to learn if you ever want to incorporate email features into your app. It's easy to get started and it's rather inexpensive thanks to budget VPS providers.

Webmail: http://roundcube.net/

Push email: http://z-push.sourceforge.net/soswp/

Console: http://www.mutt.org/

MTA: http://www.postfix.org/