Subject: Mail Delivery Failure

From: Mail Delivery System <[email-masked]>
Date: Thu, 15 Jan 2026 11:11:20 +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 [AM3PEPF00009B9D.eurprd04.prod.outlook.com 2026-01-15T11:11:20.994Z 08DE4E6FA59185A8]

The message subject was: Lär dig energieffektivisera byggnadens installationssystem
The message date was: Thu, 15 Jan 2026 12:11:15 +0100
The message identifier was: E2/69-28538-85BC8696
The message reference was: server-8.tower-872.messagelabs.com!1768475475!15623!1

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