So, you have a mac server running OS X and your boss tells you it needs to act as a mail server too. The HARD way to do things is to compile your own postfix and then manually configure it. If you are a Unix whiz then this will of course be the kind of stuff you do in your sleep but if you’re just a pleb like the rest of us then you will be interested in this neat bit of software.

Using Post Fix Enabler it took me a whopping 30 seconds to get my machine running properly as a mail server (note things were made quite a bit quicker by the fact that I had to use another server as a smarthost). Yes, it costs just under $10 but it is money well spent!