Have a look at man policyd-spf in the "TESTING THE POLICY DAEMON" section. Using the same formulation as in your master.cf to call the policy server, test and see if it works from a command line. That will usually lead to a clearer error message.
Have a look at man policyd-spf in the "TESTING THE POLICY DAEMON" section. Using the same formulation as in your master.cf to call the policy server, test and see if it works from a command line. That will usually lead to a clearer error message.