I'm looking for a mailing list manager, like mailman or majordomo, that can be installed by the user in their own home directories and run through their .procmailrc-files.

I havent looked all that much to be honest, maybe this is one way the common ones (mailman, majordomo etc) can work?

It helps if its relatively simple and maybe even has an easy to use web interface.

It needs to be able to be installed "locally", that is by the users themselves in to a directory under their home dirs. No messing with alias files or anything like that that requires root.

Any hints?