The original message was received at Sun, 11 Sep 2022 13:12:12 -0700 from: ----- The following addresses had permanent fatal errors ----- (reason: ) ----- Transcript of session follows ----- ... while talking to shw-central.mx.a.cloudfilter.net.: >>> DATA <<< 421 4.2.0 sender rejected AUP#SNDR ... Deferred: 421 4.2.0 sender rejected AUP#SNDR Message could not be delivered for 3 hours Message will be deleted from queue