On 2/19/22 01:48, linux--- via Mailman-Users wrote:
I run a small club with about 50 members. All the club mailing lists are 
private. Everyone is in the memb...@domain.name list, and there are two other 
smaller lists containing subsets of the membership, eg ad...@domain.name, 
maintena...@domain.name. When a message is sent to both ad...@domain.name and 
memb...@domain.name, recipients get both copies of the message.
Would it be better to remove individuals who are in the ad...@domain.name list 
from the memb...@domain.name list, and then add @admin as a member of the 
memb...@domain.name list. Does this make memb...@domain.name an 'umbrella' list?


First, you wouldn't add @admin as a member of memb...@domain.name. If you wanted to do this, you would add ad...@domain.name as a member of the memb...@domain.name list. The @listname syntax is only for things like subscribe_auto_approval and *_these_nonmembers. But then members removed from the smaller lists because they are also members of the larger list would not receive posts addressed only to a smaller list.

That said, there is a better way to do this.

add ad...@domain.name and maintena...@domain.name to regular_exclude_lists on the memb...@domain.name list. Then when a post is addressed to say memb...@domain.name and ad...@domain.name, members of ad...@domain.name will be excluded from delivery from the memb...@domain.name list and will receive only one copy from the ad...@domain.name list.

How you set regular_exclude_ignore on the memb...@domain.name list depends on how the smaller lists treat nonmember posts. This is to address the situation where a nonmember of say ad...@domain.name posts to memb...@domain.name and ad...@domain.name, perhaps by reply-all to a post that addressed both lists. If that post to the ad...@domain.name list will ultimately be rejected or discarded, set regular_exclude_ignore on the memb...@domain.name list to Yes, but if it will ultimately be accepted for the ad...@domain.name list set regular_exclude_ignore on the memb...@domain.name list to No.

--
Mark Sapiro <m...@msapiro.net>        The highway is for gamblers,
San Francisco Bay Area, California    better use your sense - B. Dylan
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