Mailman
From IthrynWiki
Creating a New Mailing List
Note: The default list admin password is stored in /hosts/ithryn/doc/mailman.txt. You will probably want to use this password if the new list will be related to Ithryn.
SSH into ithryn and run the following command:
$ sudo newlist newlistname newlistowner@somedomain.com newlistpassword <press enter again>
The newlist command will output some instructions for configuring post fix. The instructions are correct except for the name of the file that needs to be edited. Copy the aliases form the output starting at the ## line and past them into /etc/mail/aliases.mailman.
Next, rebuild the alias databases:
$ sudo newaliases
Now configure your mailing list by logging into: http://ithryn.net/cgi-bin/mailman/admin/newlistname
