Subject: Mail Delivery Failure

From: Mail Delivery System <[email-masked]>
Date: Tue, 20 Jan 2026 11:12:59 +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 [AM3PEPF0000A799.eurprd04.prod.outlook.com 2026-01-20T11:12:59.504Z 08DE54322C7775D3]

The message subject was: Ny kurs: Värmepump som ersättning eller komplement till värmepanna eller fjärrvärme
The message date was: Tue, 20 Jan 2026 12:12:50 +0100
The message identifier was: E3/C3-30200-B336F696
The message reference was: server-10.tower-855.messagelabs.com!1768907577!1400!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.