Subject: Mail Delivery Failure

From: Mail Delivery System <[email-masked]>
Date: Tue, 18 Nov 2025 09:52:00 +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 [DB1PEPF000509E4.eurprd03.prod.outlook.com 2025-11-18T09:52:00.189Z 08DE24462E6A643A]

The message subject was: Kurs om legionella och energiförluster i tappvattensystem
The message date was: Tue, 18 Nov 2025 10:51:58 +0100
The message identifier was: 0D/21-28178-FB14C196
The message reference was: server-12.tower-850.messagelabs.com!1763459518!3810!1

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