Rating: 

When I saw that No Starch Press was releasing an updated version on setting up your mail server, I didn't waste any time and picked it up right away.

So far I have found this book a lot more helpful than "The Definitive Guide" because it covered some additional details that were not covered in that book and others that were, but explained with a bit more understanding for a first timer as myself.

Overall, if you're planning on setting up your own mail server (at home or small office) and it's your first time than pick up this book and it will get you going in no time.