|  |  |  | GNU Mailman - List Administration Manual |  |  |  | 
 
 
The variables in this section control various filters based on the
recipient of the message.
- require_explicit_destination
- This controls whether the mailing list posting address must be
    explicitly named in the  or 
    recipient lists.  The main reason why it wouldn't is if the
    message was blind-carbon-copied (i.e. 'd) to the
    list.  Spammers like to do this, but sometimes legitimate messages
    are forwarded to the list this way.
If the list is not explicitly addressed and this setting is turned
    on, the message will be held for moderator approval.
 
 
- acceptable_aliases
- This is the list of alternative addresses that are acceptable as a
    list posting address when require_explicit_destinationis
    enabled.  This is useful for when there aliases for the main
    posting address (e.g.help@example.commay be an alias forhelp-list@example.com).
 
- max_num_recipients
- This is the maximum number of explicit recipients that are allowed
    on the posted message.  Spammers sometimes send messages with lots
    of explicit recipients, so setting this number to a reasonable
    value may cut down on spam.
Release 2.1, documentation updated on May 15, 2012.