On 10/21/2015 02:40 AM, Mark Sapiro wrote:
On 10/20/2015 04:45 PM, Marco Stoecker wrote:
I see a pattern now, when duplicates occur and it may have to do with mailman. If someone in a list send an email to two or three lists on the same server, the recipients of the list will get two or three times the same email. If it is sent to one list only, no duplicate occur. Any glue what the root cause could be?
If you are saying that people who are members of more than one list receive a copy from each list of which they are a member when a post is sent to multiple lists, that's the way Mailman works.
I.e. If I am a member of list1, list2 and list3 and someone posts to all three lists, I will receive a copy from each list.
No, what I was trying to say is, I have a list member which is also allowed (via accept_these_nonmembers) to write to other lists but is not a member of these other lists. So if firstname.lastname@example.org sent an email to email@example.com and to firstname.lastname@example.org and email@example.com is only member of firstname.lastname@example.org than email@example.com gets a duplicate email as well as all members of these two lists. Furthermore if that email is also sent to firstname.lastname@example.org, than the members as well as email@example.com will receive 3 identical emails (content wise). It seems to me as if mailman, when it hands over to postfix, duplicates the email so many times as to so many lists the emails was sent. But this is only my suggestion. I have no idea, where to look into. The mailman logs and postfix logs gave me no clear picture.
The list member setting "Avoid duplicate copies of messages?" (nodupes) does not affect this. It only affects whether I receive a list copy if I am also a To: or Cc: addressee of the post.
This is already set in the intended manner.
The list's Non-digest options -> regular_exclude_lists can modify this behavior somewhat. E.g., if the regular_exclude_lists setting for firstname.lastname@example.org includes email@example.com and firstname.lastname@example.org and the regular_exclude_lists setting for email@example.com includes firstname.lastname@example.org, then a member of all three lists will receive a copy of a post sent to all three lists from only email@example.com.
I do not use the regular_exclude_lists
regular_exclude_lists need to be set up with care. In particular, if firstname.lastname@example.org is in email@example.com's regular_exclude_lists, firstname.lastname@example.org MUST not be in email@example.com's regular_exclude_lists or a post sent to both lists will not be received by anyone who is a member of both lists.
Note that in the above, member means non-digest member. Digest members are not affected by this.