A mailing list is a special e-mail address that forwards mail to many recipients. It can be used for group discussion lists (where everyone on the list can send a message to everyone else) or announcement lists (where only the list owner can send messages).
We use the Mailman software program to handle mailing lists. Mailman is probably the most popular and powerful mailing list software available. It includes the following features:
- Recipients can subscribe and unsubscribe themselves, either by visiting a Web page or by sending an e-mail message to a special address.
- Messages can be archived so they can be viewed later on the Web.
- Group discussion lists can be "moderated", allowing you to review and approve each message. This gives you the opportunity to reject spam and other inappropriate content before your subscribers see it.
- You can create private lists so that people can't subscribe without your approval.
- Subscribers can choose to receive messages grouped together in "digest" form, cutting down on the number of messages they receive.
- Much of the routine work involved in running a mailing list (such as unsubscribing invalid addresses) is automatically handled for you.

