I did for a couple years, but moved to mailbox.org a while ago. The effort was much to high to save a few bucks and there is no real upside to it. E-Mail is a troublesome mixture of different protocols from the internet stone age held together by chewing gum (SMTP, POP3, IMAP, DNS, database or file storage, maybe ActiveSync, Web-Mailer, …)
Even when everything is up and running there is always maintenance to keep your SSL certificates up to date, update your incoming spam filter technique, keep other mail providers assured that you are not spamming (DKIM, etc.), keep all the different system services (see above) up to date and interoperable, etc. and every few years when you want to move to a new server, provider or Linux distro you start it all over again.