How to parse mailbox file in Ruby?

Question

The Ruby gem rmail has methods to parse a mailbox file on local disk. Unfortunately this gem has broken (in Ruby 2.0.0). It might not get fixed, because folks

Answer 1

You can use tmail parsing email boxes, but it was replaced by mail, but I can't really find a class that substitutes it. So you might want to keep along with tmail.

EDIT: as @tadman pointed out, it should not be working with ruby 1.9. However you can port this class (and put it on github for everyone else use :-) )