from ip216-239-77-11.vif.net [216.239.77.11]
----- The following addresses had permanent fatal errors -----
<arulo@med.sc.edu>
(reason: 550 Address not known at this site.)
----- Transcript of session follows -----
... while talking to dcsmserver.med.sc.edu.:
>>> RCPT To:<arulo@med.sc.edu>
<<< 550 Address not known at this site.
550 5.1.1 <arulo@med.sc.edu>... User unknown