Subject: Delivery Status Notification (Failure)

From: "Mail Delivery System" <[email-masked]>
Date: 20 Jul 2025 09:22:20 +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 [DB3PEPF0000885D.eurprd02.prod.outlook.com 2025-07-20T07:22:20.667Z 08DDC69584B22225]'