Setting up Mailman is relatively easy with cPanel, it really is just a matter of a few clicks before your able to start editing the configuration through a graphical user interface (GUI).
Log into your cPanel through your domain name, for example http://sjbowers.net/cpanel
You will then be presented with a form to fill in, this will be the name of your mailing list, the domain you wish to have the mailing list use and the password (don’t forget this), fill these in with what ever you require.
Once you hit the “Add Mailing List” it will be set up instantly, you then just need to click the modify button:
You will then be presented with the mailman log in screen, enter the password you just used to set the mailing list up with, your then logged in and ready to start configuring Mailman to your needs. If you set up multiple mailing lists you can also use the search box to find the one your looking for.
Have fun with your mailing lists.
If you are looking for more information on Mailman then check the projects web page: http://www.gnu.org/software/mailman/index.html