GNU Mailman provides a means to manage electronic mailing lists. The software is written primarily in Python and is free; it is licensed under the GNU General Public License (GPL), which allows you to modify the code for the software, if you wish.
If your email address is in a Mailman mailing list, you can send an
email message to the list with help in the subject or body of
the email to get an email reply showing you the commands that you can put
in email messages to the list. E.g., supposing that you are a member of
a mailing list called "browncoats" on the server example.com. To see a list
of the available commands supported by the Mailman mailing list handling
email to that mailing list, you would send an email with help
in the subject or body of the message to
browncoats-request@example.com. I.e., you would put the name
of the mailing list, in this case "browncoats" followed by a dash and the
word "request" as the email address to which you would be sending the
command. If you put help in the body of the message, you don't
need to specify a subject, but put help as the first line of
the message with no other text on the line.
[ More Info ]
