Subject: Mail Delivery Failure

From: Mail Delivery System <[email-masked]>
Date: Tue, 18 Nov 2025 09:52:16 +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 [DB1PEPF000509E9.eurprd03.prod.outlook.com 2025-11-18T09:52:16.622Z 08DE2452EBB9A7E5]

The message subject was: Kurs om legionella och energiförluster i tappvattensystem
The message date was: Tue, 18 Nov 2025 10:52:14 +0100
The message identifier was: E8/39-30126-0D14C196
The message reference was: server-11.tower-830.messagelabs.com!1763459534!3385!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.