Subject: Mail Delivery Failure

From: Mail Delivery System <[email-masked]>
Date: Thu, 11 Sep 2025 06:13:13 +0000

This is the mail delivery agent at Symantec Email Security.cloud.

I was unable to deliver your message to the following addresses:

[email-masked]

Reason: 550 5.4.1 Recipient address rejected: Access denied. For more information see https://aka.ms/EXOSmtpErrors [AMS1EPF00000042.eurprd04.prod.outlook.com 2025-09-11T06:13:13.090Z 08DDF0BFCA4FDD3B]

The message subject was: Kurs om hur man driftoptimerar och energieffektiviserar byggnader med installationstekniska åtgärder
The message date was: Thu, 11 Sep 2025 08:13:03 +0200
The message identifier was: 32/A2-14252-87862C86
The message reference was: server-12.tower-855.messagelabs.com!1757571191!31695!1

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