Subject: Mail delivery failed: returning message to sender

From: Mail Delivery System <[email-masked]>
Date: Wed, 03 Sep 2025 23:12:53 -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 olovlindgren-se.mail.protection.outlook.com [52.101.68.36]
    SMTP error from remote mail server after sending data block:
    554 5.4.14 Hop count exceeded - possible mail loop ATTR34 [DB5PEPF00014B92.eurprd02.prod.outlook.com 2025-09-04T06:12:53.828Z 08DDE8BFA48F51C4]