The original message was received at Thu, 26 May 2016 15:27:47 +0530 from 173.24.165.20 ----- The following addresses had permanent fatal errors ----- <dev at openvswitch.org> ----- Transcript of the session follows ----- ... while talking to openvswitch.org.: >>> MAIL From:"Post Office" <noreply at openvswitch.org> <<< 500 User blacklisted