Subject: [GKN Postmaster] Email Delivery Failure

From: "Postmaster GKN" <[email-masked]>
Date: Fri, 27 Jun 2025 14:15:09 +0100

This is a delivery failure notification message indicating that
an email you addressed to email address :
-- [email-masked]

could not be delivered. The problem appears to be :
-- Recipient email address is possibly incorrect

Additional information follows :
-- 5.4.1 Recipient address rejected: Access denied. For more information see https://aka.ms/EXOSmtpErrors [DU6PEPF00009526.eurprd02.prod.outlook.com 2025-06-27T13:15:06.325Z 08DDB1119437520B]

This condition occurred after 1 attempt(s) to deliver over
a period of 0 hour(s).

If you sent the email to multiple recipients, you will receive one
of these messages for each one which failed delivery,  otherwise
they have been sent.