Subject: Mail Delivery Failure

From: Mail Delivery System <[email-masked]>
Date: Tue, 13 Jan 2026 07:03:18 +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 [DB1PEPF000509EA.eurprd03.prod.outlook.com 2026-01-13T07:03:18.633Z 08DE4F299C1596FB]

The message subject was: Lär dig hantera dagsljuskraven i Boverkets nya byggregler
The message date was: Tue, 13 Jan 2026 08:03:14 +0100
The message identifier was: 67/40-30386-53EE5696
The message reference was: server-18.tower-837.messagelabs.com!1768287794!18121!1

Please do not reply to this email as it is sent from an unattended mailbox.
Contact your email administrator if you need more information, or
instructions for resolving this issue.