Subject: Mail Delivery Failure

From: Mail Delivery System <[email-masked]>
Date: Mon, 06 Oct 2025 06:01:28 +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 [DU2PEPF00028CFE.eurprd03.prod.outlook.com 2025-10-06T06:01:28.489Z 08DE044DB9D274CA]

The message subject was: Lär dig energieffektivisera byggnadens installationssystem
The message date was: Mon, 06 Oct 2025 08:01:19 +0200
The message identifier was: A3/54-20332-83B53E86
The message reference was: server-7.tower-855.messagelabs.com!1759730480!91129!1

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