Easiest Mail Server setup on Ubuntu
help.ubuntu.com
help.ubuntu.com
Anyway, what's a guide doing asking users to choose between four flavors of protocols? Just enable them all. Maildirs/mbox? Mbox is ancient, no possible reason to setup new accounts using that. And the biggest WTF has got to be the actual users created. Who wants to run a mailserver without virtual users and virtual domains in 2008 anyway?
I was planning on building an email server this morning on Ubuntu. I thought about using GMail before setting up a full server.
Besides, it's always good to know about all sorts of things, including how to setup a mail server, even if you will never need one. I'm sure that there is something that you will learn in the process, which will prove itself useful in the future. For instance, while setting up my own server I learned some stuff that helped my while coding something using the python email libraries.
So nothing wrong in learning ;)