Mark Sapiro wrote:
On 11/7/21 1:22 AM, Stephen J. Turnbull wrote:
dancab@caltech.edu writes: I deployed Mailman3 last night and today we've had some "bounced" messages with headers referencing mailman@example.com. This has only happened with a few lists. Any ideas what causes this? ... Mark may have a better idea. This is a fake DSN that is generated when Mailman's attempt to send a bounce probe results in a failure from the MTA to which Mailman delivers. See code at https://gitlab.com/mailman/mailman/-/blob/master/src/mailman/runners/outgoin... and around https://gitlab.com/mailman/mailman/-/blob/master/src/mailman/runners/outgoin...
We do have mailman@caltech.edu configured with valid members/owners. We're using Postfix for the MTA. Is it possible there's a misconfiguration there?
We've been testing the system with a handful of lists for months.
-- Dan