[bitfolk] Mail Severs

Hello!

I'm coming around to the idea of running my own mail servers again and
closing down my google apps accounts, try and free myself from our googley
overlord a little bit :)

Last time I did this I remember it being a pita to maintain. Can anyone
recommend some reading for someone who hasn't maintained a mail server for
about 7 years to catch up please?

Thank!

-Matt Daubney