efa-project.org

Hi

I am new to EFA and I have just installed my first EFA to work with our Exchange 2016 and i was all running fine for about 2 days, but all mail that is getting is listed under Graylist (Waiting (Graylist) and it is never being sent to our Exchange..
What have I done wrong ?

See anything happening in /var/log/maillog that could help you identify the issue?