Subject: Mail Delivery Failure

From: Mail Delivery System <[email-masked]>
Date: Tue, 13 Jan 2026 07:02:53 +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 [DB1PEPF000509F1.eurprd03.prod.outlook.com 2026-01-13T07:02:53.158Z 08DE4E44D314FA7B]

The message subject was: Lär dig hantera dagsljuskraven i Boverkets nya byggregler
The message date was: Tue, 13 Jan 2026 08:02:48 +0100
The message identifier was: A9/DA-31039-C1EE5696
The message reference was: server-23.tower-830.messagelabs.com!1768287771!51014!1

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