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? We are using an SMTP relay server for incoming and outgoing messages in front of the Mailman3 service.
Thanks!
Received: from [172.17.0.2] (ec2-52-25-39-43.us-west-2.compute.amazonaws.com [52 .25.39.43]) by smtp2.caltech.edu (Postfix) with ESMTP id B97472076421 for <xxxxxxx@caltech.edu>; Fri, 5 Nov 2021 12:34:34 -0700 (PDT) DKIM-Filter: OpenDKIM Filter v2.11.0 smtp2.caltech.edu B97472076421 From: Mailman <mailman@example.com> To: Mailman Bounces <mailman-bounces@example.com> Subject: SMTP Delivery Failure Message-ID: <163614051784.271.12319265021103466218@badc5045e1e5> Date: Fri, 05 Nov 2021 12:28:37 -0700
-- Dan