The original message was received at Sat, 9 Feb 2008 21:33:39 -0800
from lb.z57.com [209.75.14.120]
----- The following addresses had permanent fatal errors -----
<4539@sbcglobal.net>
(reason: 553 5.3.0 <4539@sbcglobal.net>... Addressee unknown, relay=[209.75.14.100])
----- Transcript of session follows -----
... while talking to sbcmx3.prodigy.net.:
>>> DATA
<<< 553 5.3.0 <4539@sbcglobal.net>... Addressee unknown, relay=[209.75.14.100]
550 5.1.1 <4539@sbcglobal.net>... User unknown
<<< 503 5.0.0 Need RCPT (recipient)