A note for Postfix users
If you're trying to get Postfix to run on OS X Client (where it comes pre-installed), you need to edit your master.cf and uncomment the line that tells it to bind to an internet socket.
In other words, you have to tell it, yes, you really do want it to work.
Phooey.
In other words, you have to tell it, yes, you really do want it to work.
Phooey.