The original message was received at Fri, 1 Jul 2016 10:51:03 +0530 from nero.com [30.104.201.99] ----- The following addresses had permanent fatal errors ----- <dev at openvswitch.org> ----- Transcript of the session follows ----- ... while talking to 196.232.43.214: 554 <dev at openvswitch.org>... Message is too large 554 <dev at openvswitch.org>... Service unavailable