Subject: Mail Delivery Failure

From: Mail Delivery System <[email-masked]>
Date: Tue, 20 Jan 2026 11:11:36 +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 [DU2PEPF00028D10.eurprd03.prod.outlook.com 2026-01-20T11:11:36.646Z 08DE54083308CE36]

The message subject was: Ny kurs: Värmepump som ersättning eller komplement till värmepanna eller fjärrvärme
The message date was: Tue, 20 Jan 2026 12:11:34 +0100
The message identifier was: 78/91-28538-8E26F696
The message reference was: server-7.tower-872.messagelabs.com!1768907494!2552!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.