As good as Mail::Audit is, I wouldn't want to set up a new rule for every mailing list I'm on. And this is where Mail::ListDetector (via the Mail::Audit plugin Mail::Audit::List) comes in. Mail::ListDetector automatically can detect if mails were sent to a mailing list from the headers contained in the mail and as if by magic move the mail into a appropriately named folder.
A Simple to use, no-brainer of a module that does exactly what it says on the tin. And this module my friends, is why I could never move to Outlook.