Subject: Returned mail: see transcript for details

From: Mail Delivery Subsystem <[email-masked]>
Date: Wed, 15 Oct 2008 02:49:12 +0400 (MSD)

The original message was received at Wed, 15 Oct 2008 02:48:52 +0400 (MSD)
from localhost [127.0.0.1]

   ----- The following addresses had permanent fatal errors -----
<[email-masked]>
    (reason: 550 5.1.1 Bad destination mailbox address ([email-masked]).)

   ----- Transcript of session follows -----
... while talking to [193.125.199.66]:
>>> DATA
<<< 550 5.1.1 Bad destination mailbox address ([email-masked]).
550 5.1.1 <[email-masked]>... User unknown
<<< 503 5.5.2 Need Rcpt command.