Sure, there’s a lot of people who don’t like to work with mail server stuff… postfix, qmail, exim, all of that don’t seem so efficient looking through the managing aspect. I mean, everything you want to do demands a lot of changes in config files, or adding patches and/or extra softwares.
The common way to link mail servers at databases to manage users and domains is pretty scary! So, this guy took it to the next level - he wrote his own mail server. Unfortunately, he stopped it… but he put the code at launchpad.
I’m thinking of taking a look at the code to work on it, or maybe start building my own mail server. This will probably give me a lot of knowledge. And hours of fun! 
For so many times when I was coding, I did rm * in the wrong place. One day I had to rewrite a tool twice. Then, this weekend, when I was writing some random code, I stopped and said to myself: “Pascal you dumb, you’re gonna do a rm * in the wrong place and will lose your code. Again.” To avoid this, I write backup_this. A simple tool, which compresses the current folder in a tar.gz file and sends it to gmail.
Working look’s like this:
If you wanna try, download the file here and put into /usr/bin/ and then apply the execution mode.
