Subject: Returned mail: see transcript for details

From: Mail Delivery Subsystem <[email-masked]>
Date: Wed, 15 Oct 2008 07:09:09 +0600 (YEKST)

The original message was received at Wed, 15 Oct 2008 07:08:55 +0600 (YEKST)
from [115.48.54.119]

   ----- The following addresses had permanent fatal errors -----
<[email-masked]>
    (reason: User unknown)

   ----- Transcript of session follows -----
550 5.1.1 <[email-masked]>... User unknown