Subject: Mail Delivery Failure

From: Mail Delivery System <[email-masked]>
Date: Thu, 11 Sep 2025 06:12:24 +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 [DU2PEPF00028CFE.eurprd03.prod.outlook.com 2025-09-11T06:12:24.133Z 08DDF01A5D20740C]

The message subject was: Kurs om hur man driftoptimerar och energieffektiviserar byggnader med installationstekniska åtgärder
The message date was: Thu, 11 Sep 2025 08:12:18 +0200
The message identifier was: 58/6F-30045-84862C86
The message reference was: server-6.tower-850.messagelabs.com!1757571142!3673!1

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