Returned mail: see transcript for details

[Automatic Email Delivery Software]

The original message was received at Sun, 25 Feb 2007 21:37:41 +0200
from linux.cz [148.235.47.179]

----- The following addresses had permanent fatal errors -----
redhat-cz na linux.cz

----- Transcript of session follows -----
... while talking to linux.cz.:
>>> MAIL FROM:"Automatic Email Delivery Software" <postmaster na linux.cz>
<<< 505 User unknown