Jane Frizzell wrote:

>Does mailman ever delete members from lists automatically for any 
>reason?


Automated bounce processing will do this.


>One of the owners of one of our lists (only 1 list seems to have 
>been affected) recently reported that he had lost 100 users from his 
>list. They were removed, not just marked as nomail.


This could be due to normal bounce processing. They may have been
removed after exhausting notices or immediately upon reaching the
threshold score depending on the list's Bounce processing settings.

Check Mailman's 'bounce' log for more detail on what was done and why.

Also, prior to Mailman 2.1.10 there was a bug in cron/disabled that
could cause list members with stale bounce information to be
disabled/removed if the list's bounce_score_threshold value was
lowered.
        

>A primary look at 
>some of the names lost. show that the addresses were no longer valid 
>email addresses. The addresses would have expired about 6-8 months ago. 
>The message he got as he was the owner, one message per address was:
>
>----- Forwarded message from mailman-boun...@lists.bates.edu -----
>    Date: Wed, 09 Mar 2011 09:00:05 -0500
>    From: mailman-boun...@lists.bates.edu
>Reply-To: mailman-boun...@lists.bates.edu
> Subject: batesbuild unsubscribe notification
>      To: batesbuild-ow...@lists.bates.edu
>
>usern...@bates.edu has been removed from batesbuild.


That's the generic unsubscribe owner notification. It is consistent
with removal by bounce processing.

-- 
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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