Gao skrev den 2017-11-17 22:26:
I couldn't figure out how to whitelist the backup mx on the destitution server.
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=468388 i dont know if thats resolved or not following this link here https://answers.launchpad.net/postfix-policyd-spf-perl/+question/237219 its seems dropped so only solution is to add mx into senders spf records v=spf1 mx -all
