Subject: Mail Delivery Failure

From: Mail Delivery System <[email-masked]>
Date: Sun, 07 Dec 2025 07:20:04 +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 [DB3PEPF0000885D.eurprd02.prod.outlook.com 2025-12-07T07:20:04.009Z 08DE2E8E0D25391C]

The message subject was: Kurs om hur energiförluster minskas i VVC- och tappvattensystem
The message date was: Sun, 07 Dec 2025 08:11:50 +0100
The message identifier was: 00/FE-31039-3AA25396
The message reference was: server-25.tower-830.messagelabs.com!1765091987!71950!5

Please do not reply to this email as it is sent from an unattended mailbox.
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instructions for resolving this issue.