The original message was received at Sun, 24 Feb 2008 23:43:11 -0800
from lb.z57.com [209.75.14.120]
----- The following addresses had permanent fatal errors -----
<mario@hotmail>
(reason: 550 Host unknown)
----- Transcript of session follows -----
550 5.1.2 <mario@hotmail>... Host unknown (Name server: hotmail: host not found)