Subscriptions: send mail to majordomo@postfix.org with content (not
subject): subscribe postfix-announce subscribe postfix-users subscribe postfix-testers help
postfix-announce@postfix.org: No-noise list for
announcements of Postfix releases and updates. Open subscription,
moderated posting.
postfix-users@postfix.org: General discussions about
the use of and experiences with the Postfix mail system. Open
subscription, unmoderated posting by members only.
postfix-testers@postfix.org: Discussions among developers
and testers of future Postfix releases. Moderated subscription,
unmoderated posting by members only.
