Subject: Undelivered Mail Returned to Sender

From: [email-masked] (Mail Delivery System)
Date: Tue, 18 Nov 2025 09:07:59 +0000 (UTC)

I'm sorry to have to inform you that your message could not
be delivered to one or more recipients. It's attached below.

For further assistance, please send mail to postmaster.

If you do so, please include this problem report. You can
delete your own text from the attached returned message.

                   The mail system

<[email-masked]>: host sunfab-se.mail.protection.outlook.com[52.101.68.10]
    said: 550 5.4.1 Recipient address rejected: Access denied. For more
    information see https://aka.ms/EXOSmtpErrors
    [DB1PEPF000509E4.eurprd03.prod.outlook.com 2025-11-18T09:07:59.435Z
    08DE24462E5464D8] (in reply to RCPT TO command)