package main

import "github.com/asggo/spf"

func main() {

        SMTPClientIP := "1.1.1.1"
        envelopeFrom := "[email protected]"

        result, err := spf.SPFTest(SMTPClientIP, envelopeFrom)
        if err != nil {
                panic(err)
        }

        switch result {
        case spf.Pass:
                // allow action
        case spf.Fail:
                // deny action
        }
	//...
}