Subject: Mail delivery failed: returning message to sender

From: Mail Delivery System <[email-masked]>
Date: Mon, 12 Jan 2026 23:01:46 -0800

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 brunnbergoforshed-se.mail.protection.outlook.com [52.101.68.8]
    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 [DB1PEPF000509F1.eurprd03.prod.outlook.com 2026-01-13T07:01:46.274Z 08DE4E44D3145D4A]