Subject: Mail Delivery Failure

From: Mail Delivery System <[email-masked]>
Date: Tue, 20 Jan 2026 11:12:30 +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 [DU6PEPF00009526.eurprd02.prod.outlook.com 2026-01-20T11:12:30.059Z 08DE564D9434B1E0]

The message subject was: Ny kurs: Värmepump som ersättning eller komplement till värmepanna eller fjärrvärme
The message date was: Tue, 20 Jan 2026 12:12:27 +0100
The message identifier was: F1/C2-28538-D136F696
The message reference was: server-14.tower-872.messagelabs.com!1768907548!494!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.