This program is meant to aid users migrating from procmail to Mail::Audit. It reads in procmail .rc files, and spits out a first approximation to a Mail::Audit filter which will perform the same filtering. You'll need to edit it, of course, and there's still a lot it can't do. But it'll give you a good start.
proc2ma - Procmail to Mail::Audit migrator.
proc2ma .procmailrc > filter.pl
This software is copyright (c) 2000 by Simon Cozens.
This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.