Subject: Delivery Status Notification (Failure)

From: "Mail Delivery System" <[email-masked]>
Date: 29 Jun 2025 13:57:53 +0200

The following message to <[email-masked]> was undeliverable.
The reason for the problem:
5.1.0 - Unknown address error 550-'5.4.1 Recipient address rejected: Access denied. For more information see https://aka.ms/EXOSmtpErrors [DU6PEPF00009527.eurprd02.prod.outlook.com 2025-06-29T11:57:53.568Z 08DDB655605A0409]'