Subject: Returned mail: see transcript for details

From: Mail Delivery Subsystem <[email-masked]>
Date: Sun, 16 Mar 2008 22:33:02 +0900

The original message was received at Sun, 16 Mar 2008 22:33:00 +0900
from mx-ll-58.147.37-42.tttmaxnet.com [58.147.37.42] (may be forged)

   ----- 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 uranus.bzold.plala.or.jp.:
>>> DATA
<<< 550 5.1.1 <[email-masked]>... User unknown
550 5.1.1 <[email-masked]>... User unknown
<<< 503 5.0.0 Need RCPT (recipient)