The original message was received at Tue, 17 Nov 2015 18:02:28 +0530 from [220.181.139.73] ----- The following addresses had permanent fatal errors ----- dev at openvswitch.org ----- Transcript of the session follows ----- ... while talking to 165.207.27.43: >>> RCPT To:<dev at openvswitch.org> <<< 550 5.1.1 <dev at openvswitch.org>... Not known here