Subject: Mail delivery failed: returning message to sender

From: Mail Delivery System <[email-masked]>
Date: Tue, 20 Jan 2026 03:12:56 -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 mimer-nu.mail.protection.outlook.com [52.101.68.29]
    SMTP error from remote mail server after sending data block:
    554 5.4.14 Hop count exceeded - possible mail loop ATTR34 [DU2PEPF00028D0C.eurprd03.prod.outlook.com 2026-01-20T11:12:56.408Z 08DE54399B629069]