Hacker News Reader

I'm highly interested in doing the same, can you recommend any resources that describe the process of setting up a self-hosted mail server?

Depends how much flexibility you want/need. Dovecot is pretty easy and straight forward.

Here is one with virtual domains, etc. might be overkill for your usecase though.

I personally run a stack over courier and some other hacks ontop of rdeliver, which works really nicely.

Important: Please always make sure to check that you don't run an open relay.