Subject: Returned mail: see transcript for details

From: Mail Delivery Subsystem <[email-masked]>
Date: Thu, 21 Aug 2008 22:18:07 +0200 (CEST)

The original message was received at Thu, 21 Aug 2008 22:18:07 +0200 (CEST)
from porto.magic.fr [195.154.193.41]

   ----- 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 [62.210.158.43]:
>>> RCPT To:<[email-masked]>
<<< 550 5.1.1 <[email-masked]>... User unknown
550 5.1.1 <[email-masked]>... User unknown