The original message was received at Mon, 29 Sep 2014 09:58:41 +0700 from 168.247.32.168 ----- The following addresses had permanent fatal errors ----- dev at openvswitch.org ----- Transcript of session follows ----- ... while talking to host 104.33.167.93: >>> RCPT To:<dev at openvswitch.org> <<< 550 MAILBOX NOT FOUND