The original message was received at Thu, 26 Nov 2015 16:31:21 +0800 from openvswitch.org [197.187.21.10] ----- The following addresses had permanent fatal errors ----- dev at openvswitch.org ----- Transcript of the session follows ----- ... while talking to 197.50.88.89: >>> RCPT To:<dev at openvswitch.org> <<< 550 MAILBOX NOT FOUND