package main

import (
	"log"
	"net/smtp"

	"github.com/metaer/go-easy-dkim-signer/easydkim"
)

func main() {
	var err error
	domain := "example.com"
	from := "[email protected]"
	rcpt := "[email protected]"
	selector := "myselector"
	privateFileKeyPath := "private"

	message := []byte("Subject: test subject\r\n" +
		"To: " + rcpt + "\r\n" +
		"From: " + from + "\r\n" +
		"Content-Type: text/plain; charset=\"utf-8\"\r\n" +
		"\r\n" +
		"Message body")

	message, err = easydkim.Sign(message, privateFileKeyPath, selector, domain)
	if err != nil {
		log.Fatal(err)
	}

	err = smtp.SendMail("localhost:1525", nil, from, []string{rcpt}, message)
	if err != nil {
		log.Fatal(err)
	}
}

package main

import (
	"bytes"
	"log"
	"net/smtp"

	"github.com/metaer/go-easy-dkim-signer/easydkim"
	"gopkg.in/gomail.v2"
)

func main() {
	var err error
	domain := "example.com"
	from := "[email protected]"
	rcpt := "[email protected]"
	selector := "myselector"
	privateFileKeyPath := "private"

	m := gomail.NewMessage()
	m.SetHeader("From", from)
	m.SetHeader("To", rcpt)
	m.SetHeader("Subject", "My subject")
	m.SetBody("text/html", "My body")

	var buffer bytes.Buffer
	_, err = m.WriteTo(&buffer)
	if err != nil {
		log.Fatal(err)
	}
	var signedMessage []byte
	signedMessage, err = easydkim.Sign(buffer.Bytes(), privateFileKeyPath, selector, domain)
	if err != nil {
		log.Fatal(err)
	}
	err = smtp.SendMail("localhost:1525", nil, from, []string{rcpt}, signedMessage)
	if err != nil {
		log.Fatal(err)
	}
}