Subject: Returned mail: see transcript for details

From: Mail Delivery Subsystem <[email-masked]>
Date: Thu, 13 Apr 2006 08:44:59 -0700 (PDT)

The original message was received at Thu, 13 Apr 2006 08:44:59 -0700 (PDT)
from sup3 [10.60.226.17]

   ----- The following addresses had permanent fatal errors -----
<[email-masked]>
    (reason: 501 5.1.8 Sender domain must exist)
    (expanded from: <[email-masked]>)

   ----- Transcript of session follows -----
... while talking to lyris.epinions.com.:
>>> MAIL From:<[email-masked]> SIZE=40556
<<< 501 5.1.8 Sender domain must exist
501 5.6.0 Data format error