搜索出来的使用go 发用邮件的例子并不能成功发送，所以搜到了下面这个用来解决这个问题

package servicesimport (	"fmt"	"net/smtp"	"strings")const (	EmailTo = "xxxx@163.com"  //发送给谁	EmailFrom = "xxxx@163.com"  //谁发的	EmailPass = "xxxxxxx" //密码	EmailHost = "smtp.163.com"  //一般是25端口	EmailPort = "25" //一般是25端口)type loginAuth struct {	username, password string}func LoginAuth(username, password string) smtp.Auth {	return &loginAuth{username, password}}//需要使用Login作为参数func (a *loginAuth) Start(server *smtp.ServerInfo) (string, []byte, error) {	return "LOGIN", nil, nil }func (a *loginAuth) Next(fromServer []byte, more bool) ([]byte, error) {	command := string(fromServer)	command = strings.TrimSpace(command)	command = strings.TrimSuffix(command, ":")	command = strings.ToLower(command)	if more {		if command == "username" {			return []byte(fmt.Sprintf("%s", a.username)), nil		} else if command == "password" {			return []byte(fmt.Sprintf("%s", a.password)), nil		} else {			// We've already sent everything.			return nil, fmt.Errorf("unexpected server challenge: %s", command)		}	}	return nil, nil}func SendEmail(subject, body string) error {	send_to := strings.Split(EmailTo, ";")	content_type := "Content-Type: text/plain; charset=UTF-8"	msg := []byte("To: All \r\nFrom: " + EmailFrom + " >\r\nSubject: " + subject + "\r\n" + content_type + "\r\n\r\n" + body)	auth := LoginAuth(EmailFrom, EmailPass)	err := smtp.SendMail(EmailHost+":"+EmailPort, auth, EmailFrom, send_to, msg)	return err}

需要自己实现smtp.Auth接口 然后Start()方法中添加"Login"参数。

注意：发送的邮箱必须是开启了smtp的,不然会发送不成功。

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