Subject: Returned mail: see transcript for details

From: Mail Delivery Subsystem <[email-masked]>
Date: Mon, 6 Oct 2025 12:21:20 GMT

The original message was received at Mon, 6 Oct 2025 12:21:20 GMT
from m0417473.ppops.net [127.0.0.1]

   ----- The following addresses had permanent fatal errors -----
<[email-masked]>
    (reason: 554 5.4.14 Hop count exceeded - possible mail loop ATTR34 [CO1PEPF000044F5.namprd05.prod.outlook.com 2025-10-06T12:21:20.872Z 08DE0343BC67B232])

   ----- Transcript of session follows -----
... while talking to infocorp365.mail.protection.outlook.com.:
>>> DATA
<<< 554 5.4.14 Hop count exceeded - possible mail loop ATTR34 [CO1PEPF000044F5.namprd05.prod.outlook.com 2025-10-06T12:21:20.872Z 08DE0343BC67B232]
554 5.0.0 Service unavailable