# API

- [Server](/api/server.md): Server defines a new policy server with corresponding settings
- [ServerOpt](/api/serveropt.md): SeverOpt functions let you override default values
- [Handler](/api/handler.md): Handler is the interface for you to process the policy data
- [PolicySet](/api/policyset.md): The data collection provided by the postfix server
- [Postfix(Text)Resp](/api/postfixresp.md): Possible responses for the Postfix server