This is a little utility for people using the mutt / procmail / maildir combo. When subscribing to a new mailinglists the user only has to add ONE line to ONE file. libmuttproc will help you generate procmail rules, check that maildir folders you specify actually exist, add some mutt folder-hooks, and other stuff that mutt needs
For an example of how to use libmuttproc see mymailinglists_example.py