Subject: [Gary] Returned mail: see transcript for details

From: Mail Delivery Subsystem <[email-masked]>
Date: Thu, 10 Apr 2008 05:37:22 +0400 (MSD)

The original message was received at Wed, 9 Apr 2008 13:54:42 +0400 (MSD)
from [59.99.52.79]

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This automatically generated message signals about some errors occured
while trying to deliver the message you've sent. The transcript is included
below.

   ----- The following addresses had permanent fatal errors -----
<[email-masked]>
    (reason: 553 5.3.0 <[email-masked]>... try [email-masked])

   ----- Transcript of session follows -----
... while talking to unclear.rinet.ru.:
>>> DATA
<<< 553 5.3.0 <[email-masked]>... try [email-masked]
550 5.1.1 <[email-masked]>... User unknown
<<< 503 5.0.0 Need RCPT (recipient)