Hi list,

I have recently migrated some lists from Mailman 2 to Mailman 3. Users have been added using the mailman client as pre-verified addresses so the migration happened "silently". Thus, there was a dozen "bad" addresses (domains that did not exist anymore).

Unfortunately, Mailman got some of the "bad" addresses in the first message batch for sending out, so, Postfix closed the connection because of "too many errors" and this stopped the process completely, i.e. Mailman did not continue sending messages to the rest of the list over 600 addresses.

There was no more information in the logs than the Postfix error messages in smtp.log.

Once the "bad" addresses were removed, the list started working as expected.

I consider this a bug. The bouncing addresses should have been marked as "non deliverable" and the subscriptions "paused" and the rest should have been delivered. Or, the list owner should have been notified that there was a problem with message distribution. None of these happened.

Thanks!

-- Victoriano Giralt CIO University of Malaga +34952131415 SPAIN

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