Subject: Returned mail: see transcript for details

From: Mail Delivery Subsystem <[email-masked]>
Date: Mon, 13 Oct 2025 03:54:49 -0400

The original message was received at Mon, 13 Oct 2025 03:54:43 -0400
from m0081183.ppops.net [127.0.0.1]

   ----- The following addresses had permanent fatal errors -----
<[email-masked]>
    (reason: 554 5.4.12 SMTP; Hop count exceeded - possible mail loop detected on message id <[email-masked]>)

   ----- Transcript of session follows -----
... while talking to [199.91.95.215]:
>>> DATA
<<< 554 5.4.12 SMTP; Hop count exceeded - possible mail loop detected on message id <[email-masked]>
554 5.0.0 Service unavailable