玩了一下， 发送邮件OK, 代码：
package main
import (
"fmt"
"net/smtp"
"strings"
)
func main() {
senderEmail := "xxx@gmail.com"
port := ":25"
password := "yyyyyy"
host := "smtp.gmail.com"
auth := smtp.PlainAuth("", senderEmail, password, host)
to := []string{"zzz@gmail.com"}
nickname := "sender"
user := senderEmail
subject := "this is title"
content_type := "Content-Type: text/plain; charset=UTF-8"
body := "this is content"
msg := []byte("To: " + strings.Join(to, ",") + "\r\nFrom: " + nickname +
"<" + user + ">\r\nSubject: " + subject + "\r\n" + content_type + "\r\n\r\n" + body)
err := smtp.SendMail(host + port, auth, user, to, msg)
if err != nil {
fmt.Printf("send mail error: %v", err)
}
}不多说。