Mailing lists allow companies or individuals to quickly and easily communicate by using one email address to reach many recipients. These lists are usually moderated, and some lists allow other users to send messages as well.
Popular Mailing Lists
Listserv: Listserv are the most common type of mailing lists, also known as Bitnet lists.
Listproc: Listproc are mostly run by universities and schools.
Majordomo: Majordomo is a program for automating the internet mailing lists management. Subscribers send all commands to majordomo via email to handle the list maintenance.