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

From: Mail Delivery Subsystem <[email-masked]>
Date: Tue, 29 Apr 2008 07:31:02 +0400

The original message was received at Tue, 29 Apr 2008 07:31:01 +0400
from ppp-124-121-175-150.revip2.asianet.co.th [124.121.175.150]

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

   ----- Transcript of session follows -----
... while talking to mail.segmentcom.ru.:
>>> RCPT To:<[email-masked]>
<<< 550 5.1.1 <[email-masked]>... User unknown
550 5.1.1 <[email-masked]>... User unknown