Go语言轻松实现邮件发送通知功能的完全指南

package utils

import (
    "crypto/tls"
    "fmt"
    "net/smtp"
    "strings"

    "github.com/flipped-aurora/gin-vue-admin/server/plugin/email/global"
    "github.com/jordan-wright/email"
)

// 发送邮件的主方法
func send(to []string, subject string, body string) error {
    from := global.globalconfig.from
    nickname := global.globalconfig.nickname
    secret := global.globalconfig.secret
    host := global.globalconfig.host
    port := global.globalconfig.port
    isssl := global.globalconfig.isssl

    auth := smtp.plainauth("", from, secret, host)
    e := email.newemail()
    if nickname != "" {
        e.from = fmt.sprintf("%s <%s>", nickname, from)
    } else {
        e.from = from
    }
    e.to = to
    e.subject = subject
    e.html = []byte(body)

    var err error
    hostaddr := fmt.sprintf("%s:%d", host, port)
    if isssl {
        err = e.sendwithtls(hostaddr, auth, &tls.config{servername: host})
    } else {
        err = e.send(hostaddr, auth)
    }
    return err
}

// 普通邮件发送方法
func email(to, subject, body string) error {
    to := strings.split(to, ",")
    return send(to, subject, body)
}

// 发送错误告警邮件
func errortoemail(subject, body string) error {
    to := strings.split(global.globalconfig.to, ",")
    if to[len(to)-1] == "" {
        to = to[:len(to)-1]
    }
    return send(to, subject, body)
}

// 测试邮件发送方法
func emailtest(subject, body string) error {
    to := []string{global.globalconfig.to}
    return send(to, subject, body)
}

globalconfig = struct {
    from     string
    nickname string
    secret   string
    host     string
    port     int
    isssl    bool
    to       string
}{
    from:     "your_email@example.com",
    nickname: "go mailer",
    secret:   "your_smtp_secret", // qq/163/gmail 需要使用授权码
    host:     "smtp.example.com",
    port:     465,
    isssl:    true,
    to:       "receiver@example.com",
}

err := utils.email("receiver@example.com", "go 邮件测试", "<h1>hello from go!</h1>")
if err != nil {
    fmt.println("邮件发送失败:", err)
} else {
    fmt.println("邮件发送成功！")
}

err := utils.errortoemail("系统错误", "<p>检测到异常，请立即处理！</p>")
if err != nil {
    fmt.println("告警邮件发送失败:", err)
} else {
    fmt.println("告警邮件发送成功！")
}

err := utils.emailtest("测试邮件", "<p>这是一封测试邮件</p>")
if err != nil {
    fmt.println("测试邮件发送失败:", err)
} else {
    fmt.println("测试邮件发送成功！")
}