golang如何实现收发邮件？

package main
import (
    "gopkg.in/gomail.v2"
)
func main() {
    m := gomail.NewMessage()
    m.SetHeader("From", "xxxxx@qq.com")
    m.SetHeader("To", "yyyyy@qq.com")
    //m.SetAddressHeader("Cc", "dan@example.com", "Dan")
    m.SetHeader("Subject", "Hello!")
    m.SetBody("text/html", "Hello <b>Bob</b> and <i>Cora</i>!")
    //m.Attach("/home/Alex/lolcat.jpg")
    d := gomail.NewDialer("smtp.qq.com", 587, "xxxxx@qq.com", "okbnsnqptzjzfigd")
    // Send the email to Bob, Cora and Dan.
    if err := d.DialAndSend(m); err != nil {
        panic(err)
    }
}