[Mailman-Users] Getting duplicates when people CC list

Brad Knowles brad at stop.mail-abuse.org
Sun Apr 30 14:45:50 CEST 2006


At 8:28 AM +0000 2006-04-30, Tony G wrote:

>  I do not get dupes of all mails otherwise I'd suspect double subscription.
>  The Avoid Duplicates flag is set. This only happens for mails that have
>  the list in the CC -  I understand the dupe flag is for when people use
>  ReplyAll and the recipient is in both the list of subscribers and the CC
>  for the mail.

	It's not just the recipient, but the exact same recipient 
address.  So, if you're subscribed to the list with one address, and 
they cc: a different address of yours, then the system has no way to 
tell that these are both the same person.

>                 I believe the code is supposed to filter duplicate
>  Message-IDs to a given recipient no matter how those dupes are generated,
>  but I'm getting them. Any ideas?

	No, the code doesn't work at the Message-ID level.  It works at 
the level of the listed recipients in the To: and CC: headers.

	If you want filtering done at the Message-ID level, then you need 
to apply that on your end -- either use a program like procmail to 
filter all your incoming mail, or set up your MUA to discard 
duplicates, etc....

	There's nothing more that Mailman can do to help you.

-- 
Brad Knowles, <brad at stop.mail-abuse.org>

"Those who would give up essential Liberty, to purchase a little
temporary Safety, deserve neither Liberty nor Safety."

     -- Benjamin Franklin (1706-1790), reply of the Pennsylvania
     Assembly to the Governor, November 11, 1755

  LOPSA member since December 2005.  See <http://www.lopsa.org/>.



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