Subject: Delivery Status Notification (Failure)

From: "Mail Delivery System" <[email-masked]>
Date: 11 Sep 2025 16:32:43 +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 [DU2PEPF0001E9C5.eurprd03.prod.outlook.com 2025-09-11T14:32:43.863Z 08DDED8BFD2F9A61]'