Subject: Returned mail: see transcript for details

From: Mail Delivery Subsystem <[email-masked]>
Date: Thu, 15 Jan 2026 23:32:39 +1000

The original message was received at Thu, 15 Jan 2026 23:32:38 +1000
from m0442542.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 [CH1PEPF0000AD7E.namprd04.prod.outlook.com 2026-01-15T13:32:39.186Z 08DE4E6C602BA3EE])

   ----- Transcript of session follows -----
... while talking to tandt-com.mail.protection.outlook.com.:
>>> DATA
<<< 554 5.4.14 Hop count exceeded - possible mail loop ATTR34 [CH1PEPF0000AD7E.namprd04.prod.outlook.com 2026-01-15T13:32:39.186Z 08DE4E6C602BA3EE]
554 5.0.0 Service unavailable