Send email using via Mailgun API using Go

sendmail.go

package main

import (
	"fmt"
	"log"

	mailgun "github.com/mailgun/mailgun-go"
)

var mailgunDomain = "yourdomain.com"
var mailgunAPIKey = "yourAPIKey"

func main() {
	mg := mailgun.NewMailgun(mailgunDomain, mailgunAPIKey)

	sender := "sender@yourdomain.com"
	subject := "Subject here"
	body := "Content here"
	recipient := "recipient@somedomain.com"

	sendMessage(mg, sender, subject, body, recipient)

}

func sendMessage(mg mailgun.Mailgun, sender, subject, body, recipient string) {
	message := mg.NewMessage(sender, subject, body, recipient)
	resp, id, err := mg.Send(message)

	if err != nil {
		log.Fatal(err)
	}

	fmt.Printf("ID: %s Resp: %s\n", id, resp)
}