Subject: Returned mail: see transcript for details

From: Mail Delivery Subsystem <[email-masked]>
Date: Fri, 3 Oct 2025 11:31:19 GMT

The original message was received at Fri, 3 Oct 2025 11:31:17 GMT
from m0417477.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 [BN2PEPF000055DC.namprd21.prod.outlook.com 2025-10-03T11:31:19.133Z 08DDF8301840E4FC])

   ----- Transcript of session follows -----
... while talking to infocorp365.mail.protection.outlook.com.:
>>> DATA
<<< 554 5.4.14 Hop count exceeded - possible mail loop ATTR34 [BN2PEPF000055DC.namprd21.prod.outlook.com 2025-10-03T11:31:19.133Z 08DDF8301840E4FC]
554 5.0.0 Service unavailable