The original message was received at Fri, 20 Oct 2006 16:56:06 -0700 from linux.cz [87.111.199.134] ----- The following addresses had permanent fatal errors ----- sendmail na linux.cz ----- Transcript of session follows ----- ... while talking to server 197.53.10.105: 550 5.1.2 <sendmail na linux.cz>... Host unknown (Name server: host not found)