Subject: Mail delivery failed: returning message to sender

From: Mail Delivery System <[email-masked]>
Date: Wed, 03 Sep 2025 23:18:06 -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 [52.101.68.5]
    SMTP error from remote mail server after sending data block:
    554 5.4.14 Hop count exceeded - possible mail loop ATTR34 [DB1PEPF00039230.eurprd03.prod.outlook.com 2025-09-04T06:18:07.521Z 08DDE97D90F71B89]