Dear all,
after upgrading his Mac to MacOS 12.0.1 Monterey, one of our users can not send send signed messages to lists using Apple Mail v. 15.0 (3693.20.0.1.32).
mailman3 denys the delivery of the mail with error message: host 172.19.0.4[172.19.0.4] said: 501 Message has defects (in reply to end of DATA command)
I.e. mailman does not process the message, but rejects it already in the incoming smtp session. Is that a known issue?
We use mailman3 docker installation, version info: GNU Mailman 3.3.4 (Tom Sawyer) Python 3.8.10 (default, May 6 2021, 06:30:44)
Viele Grüße,
Rainer Herbst Leiter IT-Service Phone: +49 331 7499-257 e-mail: rainer.herbst@aip.de https://www.aip.de
Leibniz-Institut für Astrophysik Potsdam (AIP) An der Sternwarte 16, 14482 Potsdam
Vorstand: Prof. Dr. Matthias Steinmetz, Wolfram Rosenbach Stiftung bürgerlichen Rechts Stiftungsverzeichnis Brandenburg: 26 742-00/7026
Mailman's content filtering has removed the following MIME parts from this message.
Content-Type: application/x-pkcs7-signature Name: smime.p7s