I'd like to add my 2 cents in praise of Fastmail...I've had an account for quite a while (though I still don't know the "ins and outs" of the service- that's why I'm here
) and it's still my primary account. It's far more flexible than any other service that I've personally tried, the web interface is clean and easy to use, the service overall (especially lately) is quite stable, and the options and terms for expanding your service level and other features are quite reasonable. Thanks and best wishes for continued success to the folks at Fastmail.