Hello. There was a problem when friend@example1.com tried to send a message to tom@example2.com
(where MX records for example2.com are mx1.de.opalstack.com. and mx2.de.opalstack.com.)
which resulted in the following report being sent to friend@example1.com:
Message not delivered
There was a problem delivering your message to tom@example2.com. See the technical details below, or try resending in a few minutes.
The response from the remote server was:
554 5.7.1 Spam message rejected
Reporting-MTA: dns; googlemail.com
Received-From-MTA: dns; friend@example1.com
Arrival-Date: Wed, 15 Jan 2025 06:07:06 -0800 (PST)
X-Original-Message-ID: e39a8b38-560d-49d1-ac81-47b0a650c315@example1.com
Final-Recipient: rfc822; tom@example2.com
Action: failed
Status: 5.7.1
Remote-MTA: dns; mx2.de.opalstack.com. (178.162.221.165, the server for the
domain example2.com.)
Diagnostic-Code: smtp; 554 5.7.1 Spam message rejected
Last-Attempt-Date: Wed, 15 Jan 2025 06:07:08 -0800 (PST)
The message in question cannot by any stretch of the imagination be described as spam. I'm not aware of having asked any of my services at opalstack to do any spam filtering for me (but I could be mis-remembering).
Where did my friend and/or I go wrong?
