Mailman is software to help manage electronic mail discussion lists, much like Majordomo or Smartmail. Mailman gives each mailing list a unique web page and allows users to subscribe, unsubscribe, and change their account options over the web. Even the list manager can administer his or her list entirely via the web. Mailman has most of the features that people want in a mailing list management system, including built-in archiving, mail-to-news gateways, spam filters, bounce detection, digest delivery, and so on. See the features page for more details.

Mailman Features

• Web based list administration for nearly all tasks, including list configuration, moderation (post approvals), management of user accounts.
• Web based subscribing and unsubscribing, and user configuration management. Users can temporarily disable their accounts, select digest modes, hide their email addresses from other members, etc.
• A customizable home page for each mailing list.
• Per-list privacy features, such as closed-subscriptions, private archives, private membership rosters, etc.
• Configurable (per-list and per-user) delivery mode
  • Regular (immediate) delivery
  • MIME digest
  • Plain (RFC 934) digests
• Integrated bounce detection within an extensible framework. Automatic disposition of bouncing addresses (disable, unsubscribe).
• Integrated spam filters.
• Automatic web-based Hypermail-style archiving, with hooks for external archivers such as MHonArc.
• Integrated Usenet gatewaying.
• Integrated auto-replies.
• Majordomo-style email based commands.
• Multiple list owners and moderators are possible.
• An extensible mail delivery pipeline.