Subject: Mail Delivery Failure

From: Mail Delivery System <[email-masked]>
Date: Sun, 07 Dec 2025 07:10:42 +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 [AM3PEPF0000A78D.eurprd04.prod.outlook.com 2025-12-07T07:10:42.594Z 08DE33DA35E7E2B8]

The message subject was: Kurs om hur energiförluster minskas i VVC- och tappvattensystem
The message date was: Sun, 07 Dec 2025 08:10:40 +0100
The message identifier was: A6/86-30142-27825396
The message reference was: server-7.tower-872.messagelabs.com!1765091440!78708!1

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