Subject: Mail delivery failed: returning message to sender

From: Mail Delivery System <[email-masked]>
Date: Sun, 12 Oct 2025 23:01:41 -0700

This message was created automatically by mail delivery software.

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]
    host strangnas-se.mail.protection.outlook.com [52.101.68.5]
    SMTP error from remote mail server after RCPT TO:<[email-masked]>:
    550 5.4.1 Recipient address rejected: Access denied. For more information see https://aka.ms/EXOSmtpErrors [DB1PEPF0003922D.eurprd03.prod.outlook.com 2025-10-13T06:01:41.469Z 08DE09DB65743AE3]