The original message was received at Tue, 17 Jul 2007 08:12:28 +0200
from hades.udg.edu [84.88.145.48]

   ----- The following addresses had permanent fatal errors -----
<marvin@grn.es>
    (reason: 550 <marvin@grn.es>: Recipient address rejected: User unknown in relay recipient table)

   ----- Transcript of session follows -----
... while talking to mx1.grn.es.:
>>> DATA
<<< 550 <marvin@grn.es>: Recipient address rejected: User unknown in relay recipient table
550 5.1.1 <marvin@grn.es>... User unknown
<<< 554 Error: no valid recipients