Subject: Returned mail: see transcript for details

From: Mail Delivery Subsystem <[email-masked]>
Date: Thu, 15 Jan 2026 23:36:14 +1000

The original message was received at Thu, 15 Jan 2026 23:36:13 +1000
from m0442540.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 [CY4PEPF0000EDD4.namprd03.prod.outlook.com 2026-01-15T13:36:14.697Z 08DE54185E103432])

   ----- 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 [CY4PEPF0000EDD4.namprd03.prod.outlook.com 2026-01-15T13:36:14.697Z 08DE54185E103432]
554 5.0.0 Service unavailable