The IETF has just published a new RFC that specifies particular enhanced status codes for email authentication failures:
https://www.rfc-editor.org/rfc/rfc7372.txt I have a policy server for which this is relevant. I'd like to provide an enhanced status code for Postfix to use, but I don't find in the documentation where that's possible via the policy interface. My assumption is this is the usual, if it's not documented, then either you can't do it or you shouldn't rely on it (so this is a feature request), but I'd love to find out I missed something and be pointed in the right direction. Scott K
