ecartis

Ecartis is a open-source (GNU Licence) software package that adminsters
mailing lists (similar to Majordomo and Listserv). Some of Ecartis's
features include:

- A modular design structure, so that you can compile what you
need (and don't)
- The ability to strip down MIME messages and remove their
attachments.
- Ability to be run in a multi-Virtual Host configuration.

Take a look at the Ecartis website to get a full feature list: