Subject: Delivery Status Notification (Failure)

From: "Mail Delivery System" <[email-masked]>
Date: 29 Sep 2025 08:02:21 +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 [AMS1EPF00000041.eurprd04.prod.outlook.com 2025-09-29T06:02:22.304Z 08DDFC38C473DCFC]'

Subject: =?utf-8?q?=5BBULK=5D