[Mailman-Users] Bounce Processing -- Disable/Removal Notification

Greg Sims greg at headingup.net
Sun Sep 30 05:30:48 CEST 2007


I believe you have the problem narrowed down. Here are the answers to your

Do these entries say "sending listname list probe to: user at example.com
(score 5.0 >= 5.0)"?
>> Yes

Is VERP_PROBES = Yes in mm_cfg.py (or is this Mailman 2.1.5 where VERP
probes was unconditionally on)?
>> 2.1.5

If so, do you see in the bounce log that a probe was sent but didn't
bounce? If so, it is likely that your MTA doesn't recognize the '+'
delimiter to separate the VERP probe token from the local part of an
address and can't deliver the bounce.
>> I believe so.  A score of 5.0 is reached, the probe message is sent
>> and the next thing I see is another bounce with a score of 1.0.

>It appears there are a number of candidates that could have their
>subscriptions Disabled and/or Removed from the list.  I have been the list
>admin for two years now and I have never received an email saying a list
>member has been Disabled or Removed.  This seems odd based on what I am
>seeing in the logs.  I do receive emails for bounce messages that fail
>detection regularly.

'Disabling' entries will appear in the bounce log if members are
actually disabled.
>> There are no Disabling entries in the logs.

bin/list_members --nomail=bybounce listname
will list all the disabled by bounce members.
>> This command returns null.

If there aren't any, and I suspect there aren't, I suspect that
examination of the bounce log will show "sending listname list probe
to: user at example.com (score 5.0 >= 5.0)" entries, but no "listname:
user at example.com disabling due to probe bounce received" entries.
>> Correct!

If this is the case, I suspect it is because the MTA does not know how
to deliver mail addressed to listname-bounces+xxxxxx at listdomain or at
least doesn't pipe it to the wrapper as it does for mail to
listname-bounces at listdomain.

>> The server is using Qmail.  What can I do to fix this problem or work
>> around it.  Do I need to remove entries from the subscription manually?
>> If this is the case, this will need to be automated in some way as it
>> will be very time consuming.

Thanks again for your help Mark!  Greg

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