Returned mail: see transcript for details

[Automatic Email Delivery Software]

The original message was received at Mon, 29 Jan 2007 12:56:54 +0100 from linux.cz [4.99.22.241]

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

----- Transcript of session follows -----
... while talking to 165.247.241.95:
550 5.1.2 <sendmail na linux.cz>... Host unknown (Name server: host not found)