HELP listname Lists a brief description of the list requested. Lists all mailing lists to which the given address is subscribed. If you omit the 'address' the command will assume the mailbox is in the from line. Mail is sent to the address given to confirm the add or delete operation. Unsubscribes given address from all mailing lists.
Mail is sent the address given to confirm the deletions.
If the listname parameter is omitted, a list of available FAQs is sent instead. A command must be the first word on each line in the message. Lines which do not start with a command word result in this file to be sent. If no commands were found in the entire message, that message is completely ignored. You will always receive a response to any command found in the mail.