As someone who hosts my own mail but doesn't consider myself a real sysadmin, I will say that there are definite benefits and downsides. The biggest benefit is that I can be my own control freak. The biggest downside is that occasionally large mail providers (yahoo seems to be the biggest thorn in my side but most of those interactions are from many years ago) decide they don't want to play ball with you and all of your mail goes into spam folders on their system until you jump through their hoops.
no subject