The venerable Mailman list management system is soon to have a new
version (see
https://lwn.net/Articles/638090/). There's a live demo of
the new user archives interface for the Fedora lists at:
http://lists-dev.cloud.fedoraproject.org/archives/?sort=active
The Users list can be found at:
http://lists-dev.cloud.fedoraproject.org/archives/list/users%
40lists.fedoraproject.org/
(I have no connection with the Mailman project or Fedora list
administration and of course this is Beta software so be warned).
poc