Subject: Mail delivery failed: returning message to sender

From: Mail Delivery System <[email-masked]>
Date: Thu, 16 Oct 2025 03:09:08 -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 bsv-se.mail.protection.outlook.com [52.101.68.3]
    SMTP error from remote mail server after sending data block:
    554 5.4.14 Hop count exceeded - possible mail loop ATTR34 [DU2PEPF0001E9C6.eurprd03.prod.outlook.com 2025-10-16T10:09:08.531Z 08DE0C8365B5E281]