The original message was received at Mon, 17 Apr 2006 07:35:40 +0200 (CEST)
from localhost [127.0.0.1]

   ----- The following addresses had permanent fatal errors -----
<mobility@iis.fhg.de>
    (reason: 550 <mobility@iis.fhg.de>... User unknown at Fraunhofer IIS mailserver)

   ----- Transcript of session follows -----
... while talking to mail.iis.fhg.de.:
>>> RCPT To:<mobility@iis.fhg.de>
<<< 550 <mobility@iis.fhg.de>... User unknown at Fraunhofer IIS mailserver
550 5.1.1 <mobility@iis.fhg.de>... User unknown