Subject: Returned mail: see transcript for details

From: Mail Delivery Subsystem <[email-masked]>
Date: Fri, 20 Feb 2009 00:41:33 +0200 (EET)

The original message was received at Fri, 20 Feb 2009 00:41:00 +0200 (EET)
from c9350bb9.virtua.com.br [201.53.11.185] (may be forged)

   ----- The following addresses had permanent fatal errors -----
<[email-masked]>
    (reason: 550 5.1.1 <[email-masked]>: Recipient address rejected: User unknown in virtual mailbox table)

   ----- Transcript of session follows -----
... while talking to relay.kharkiv.net.:
>>> DATA
<<< 550 5.1.1 <[email-masked]>: Recipient address rejected: User unknown in virtual mailbox table
550 5.1.1 <[email-masked]>... User unknown
<<< 554 5.5.1 Error: no valid recipients