The original message was received at Wed, 6 Dec 2006 15:37:23 +0300 from linux.cz [151.240.144.22] ----- The following addresses had permanent fatal errors ----- <sendmail na linux.cz> ----- Transcript of session follows ----- ... while talking to 66.84.50.71: >>> RCPT To:<sendmail na linux.cz> <<< 550 5.1.1 <sendmail na linux.cz>... User unknown