mailing-list
the next-generation mailing-list archiver.
HyperKitty is an open source Django application under development. It aims to provide a web interface to access GNU Mailman v3 archives.
Free and open source self-hosted newsletter, mailing list manager, and transactional mails.
Sympa is an opensource mailing list manager. It provides advanced features with a rich and secure web interface.
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. See the features page for details.