A mailing list provides a convenient means to exchange ideas and information by distributing e-mail to all users who are subscribed. Types of lists can be Announce only, Moderated, or Open discussion.
Each mailing list is given a unique web page that allows users to subscribe, unsubscribe, and change their account options. Meanwhile list managers administer their lists entirely via the web. The mailing list management system, Mailman, includes configurable archiving, mail-to-news gateways, spam filters, bounce detection, digest delivery, and more.