Mailman is a Python mailing list manager that’s really old, stable, and works very well, hence the extreme popularity. It hooks into a mail server (like Postfix, Exim, Sendmail, Qmail etc) and manages lists that the mail server will then handle delivery for.
|command||what it does|
|change_pw||changes passwords for a list admin|
|list_admins||lists all the list owners|
|list_lists||shows what lists are on this server|
|list_members listname||lists all the members of a list|
|newlist whateverlistname||creates a new list|