tools/mail/mail.go

package mail

import (
	"errors"
	"fmt"
	"net/smtp"
	"strings"
)

// Mail 邮件配置
type Mail struct {
	Nickname string `json:"nickname"`
	User     string `json:"user"`
	Password string `json:"password"`
	Host     string `json:"host"`
	Port     string `json:"port"`
}

// Auth 身份认证
func (m *Mail) Auth() smtp.Auth {
	return smtp.PlainAuth("", m.User, m.Password, m.Host)
}

func (m *Mail) checkParam() error {
	if m.Host == "" || m.Nickname == "" || m.Password == "" || m.Port == "" || m.User == "" {
		return errors.New("请先配置邮箱")
	}
	return nil
}

// SendMail 发送邮件
func (m *Mail) SendMail(subject string, to []string, body string) (err error) {
	err = m.checkParam()
	if err != nil {
		return
	}
	template := `To:%s
From:%s<%s>
Subject:%s
Content-Type: text/html; charset=UTF-8

<html>
	<body>
		%s
	<body>
</html>
	`

	msg := []byte(fmt.Sprintf(template, strings.Join(to, ","), m.Nickname, m.User, subject, body))

	return smtp.SendMail(m.Host+":"+m.Port, m.Auth(), m.User, to, msg)
}