Hello, We have a Postfix instance that we're attempting to use a milter (mail filter) on. We've used the instructions in the mail filter and added this in our main.cf: smtpd_recipient_restrictions = permit_mynetworks, reject_unauth_destination, check_policy_service inet:127.0.0.1:10031 We have verified that Postfix is reading this line as expected but it doesn't seem like it is calling the service on port 10031. We have verified that the service is running as expected, but all mail doesn't seem to be going through this filter. In fact, if we run Netcat and have it listen on port 10031, we never get a connection to this port. Ever. We've tried various troubleshooting options but we can't seem to get Postfix to call the service on this port. Looking through Google we have verified on the setup pages for other services that we have set this up correctly. Troubleshooting tips? Anyone else run into this problem before? Thank you.