Subject: Mail Delivery Failure

From: Mail Delivery System <[email-masked]>
Date: Thu, 15 Jan 2026 11:12:33 +0000

This message was created automatically by the mail system (ecelerity).

A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es) failed:

>>> [email-masked] (after RCPT TO): 550 5.4.1 Recipient address rejected: Access denied. For more information see https://aka.ms/EXOSmtpErrors [SN1PEPF0002636A.namprd02.prod.outlook.com 2026-01-15T11:12:33.452Z 08DE4EA842DBAF99]