If you’ve decided to you run your own server and you have sufficient resources and know-how you could run your own email server. Alternatively you could make it somebody else’s problem buy using a “cloud” service such as Office Live (limited locations, not AU) or Google Apps. A nearby church with about a dozen people in the office recently switched from using MS Exchange to using Google, and they love it. The great thing about these services is that you can use your own domain, so you can be email@example.com rather than firstname.lastname@example.org.
IT and the small church office – Part 4: E-mail