Subject: Returned mail: Data format error

From: "Mail Administrator" <[email-masked]>
Date: Wed, 6 Jul 2005 09:13:00 +0200

The original message was received at Wed, 6 Jul 2005 09:13:00 +0200
from [121.180.73.247]

----- The following addresses had permanent fatal errors -----
<[email-masked]>

----- Transcript of the session follows -----
... while talking to host 127.179.37.81:
>>> RCPT To:<[email-masked]>
<<< 550 5.1.1 <[email-masked]>... User unknown