What's the output of (run on the server that has postfix installed): postconf -n | grep relay
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1549388 Title: In some rare cases Postfix connect to a wrong MX server To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/postfix/+bug/1549388/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs