Subject: Delivery Status Notification (Failure)

From: "Mail Delivery System" <[email-masked]>
Date: 13 Jan 2026 01:22:48 -0800

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 [MN1PEPF0000F0E5.namprd04.prod.outlook.com 2026-01-13T09:22:49.189Z 08DE4E5563D18FCA]'