Subject: Mail Delivery Failure

From: Mail Delivery System <[email-masked]>
Date: Tue, 20 Jan 2026 11:11:37 +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 [AMS0EPF000001A4.eurprd05.prod.outlook.com 2026-01-20T11:11:37.392Z 08DE53F4649D3305]

The message subject was: Ny kurs: Värmepump som ersättning eller komplement till värmepanna eller fjärrvärme
The message date was: Tue, 20 Jan 2026 12:11:35 +0100
The message identifier was: E1/22-30200-9E26F696
The message reference was: server-11.tower-850.messagelabs.com!1768907495!250!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.