Mailman
Mailman is free software for managing electronic mail discussion and e-newsletter lists. Mailman is integrated with the web, making it easy for users to manage their accounts and for list owners to administer their lists. Mailman supports built-in archiving, automatic bounce processing, content filtering, digest delivery, spam filters, and more.
https://list.orgTop Websites
- tu-dortmund.de
- opensuse.org
- macromates.com
- archlinux.org
- fedoraproject.org
- cert.at
- libvirt.org
- dovecot.org
- surbl.org
- fedorahosted.org