Subject: Returned mail: see transcript for details

From: Mail Delivery Subsystem <[email-masked]>
Date: Fri, 22 Aug 2008 05:50:24 +0400 (MSD)

The original message was received at Fri, 22 Aug 2008 05:49:21 +0400 (MSD)
from [124.118.201.244]

   ----- The following addresses had permanent fatal errors -----
<[email-masked]>
    (reason: 550 5.1.1 User unknown)

   ----- Transcript of session follows -----
... while talking to localhost:
>>> DATA
<<< 550 5.1.1 User unknown
550 5.1.1 <[email-masked]>... User unknown
<<< 503 5.5.1 No recipients