The system administrator can create one or several mailing lists. Users from the same or any other mail system can subscribe to these mailing lists using the Web interface or by sending E-mail. They can post messages on mailing lists by sending E-mail to the list addresses, and posted messages are delivered to all subscribers. All posted messages are stored in the mailing list Mailbox that serves as an archive.
If a user subscribes in the FEED mode, all posted messages are redirected to that user immediately after they are received by the LIST module.
When a user subscribes in the DIGEST mode, the user starts to receive list digests: a multi-part messages generated with the LIST module for each mailing list. Each digest message contains all messages posted on the list since the last digest was generated, prefixed with an index of these messages.
When a user subscribes in the INDEX mode, the user starts to receive messages containing the indexes of newly posted messages. If the user wants to read some of the posted messages, they can use a Web browser to access the mailing list archive.