The original message was received at Mon, 28 Jan 2008 17:44:52 -0800
from lb.z57.com [209.75.14.120]
----- The following addresses had permanent fatal errors -----
<fyao@yaoo.com>
----- Transcript of session follows -----
550 5.1.2 <fyao@yaoo.com>... Host unknown (Name server: .: host not found)