Original URL: http://help.hardhathosting.com/question.php/189
From http://www.greatcircle.com/majordomo/FAQ.html [Link: http://www.greatcircle.com/majordomo/FAQ.html]: "Majordomo is a program which automates the management of Internet mailing lists. Commands are sent to Majordomo via electronic mail to handle all aspects of list maintenance. Once a list is set up, virtually all operations can be performed remotely, requiring no intervention upon the postmaster of the list site."
Hard Hat Hosting offers Majordomo as a ValueApp that must be installed. It will be installed at /usr/local/majordomo.