Subject: Returned mail: see transcript for details

From: Mail Delivery Subsystem <[email-masked]>
Date: Tue, 28 Oct 2008 13:30:45 +0700

The original message was received at Thu, 23 Oct 2008 14:22:55 +0700
from [58.187.170.179]

   ----- The following addresses had permanent fatal errors -----
<[email-masked]>
    (reason: 450 <[email-masked]>: User unknown in local recipient table)

   ----- Transcript of session follows -----
... while talking to [89.105.145.163]:
>>> DATA
<<< 450 <[email-masked]>: User unknown in local recipient table
<[email-masked]>... Deferred: 450 <[email-masked]>: User unknown in local recipient table
<<< 554 Error: no valid recipients
Message could not be delivered for 5 days
Message will be deleted from queue