The original message was received at Mon, 15 May 2006 15:23:10 +0400 from [121.92.1.190] ----- The following addresses had permanent fatal errors ----- <databases na linux.cz> ----- Transcript of session follows ----- ... while talking to 74.65.146.101: 550 5.1.2 <databases na linux.cz>... Host unknown (Name server: host not found)