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go语言发送邮件

2023-08-17  今日头条  干饭人小羽
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发送邮件是实际业务中经常会用到的一个功能,而在Go语言中实现发送邮件的库也有很多,这篇文章将介绍go语言中如何发邮件。

1. 登录QQ邮箱,选择账户,开启POP3/SMTP服务和IMAP/SMTP服务,并生成授权码



 

2. 使用go语言的smtp包发送邮件

 

func SendEduEmail(user, password, host, to, subject, body, mailtype string) error {

hp := strings.Split(host, ":")

auth := smtp.PlainAuth("", user, password, hp[0])

var content_type string

if mailtype == "html" {

content_type = "Content-Type: text/" + mailtype + "; charset=UTF-8"

} else {

content_type = "Content-Type: text/plain" + "; charset=UTF-8"

}

msg := []byte("To: " + to + "rnFrom: " + user + ">rnSubject: " + subject + "rn" + content_type + "rnrn" + body)

send_to := strings.Split(to, ";")

err := smtp.SendMail(host, auth, user, send_to, msg)

return err

}

 

package main

import (

"fmt"

)

func main() {

send_email_test1()

}

iunc send_email_test1() {

var to = []string{"15735177116@163.com", "201800910862@b.sxmu.edu.cn"}

from := "1271570224@qq.com"

nickname := "张亚飞"

secret := "xxxxxxxx"

host := "smtp.qq.com"

port := 25

subject := "Perfect Vue Admin 发送邮件测试"

body := "测试内容"

if err := go_email.SendEmail(from, to, secret, host, nickname, subject, body, port, true); err != nil{

fmt.Println("发送失败: ", err)

}else {

fmt.Println("发送成功")

}

}

 

3. 使用"jordan-wright/email"发送邮件

关键参数

// Email is the type used for email messages

type Email struct {

ReplyTo []string

From string

To []string

Bcc []string

Cc []string

Subject string

Text []byte // Plaintext message (optional)

HTML []byte // Html message (optional)

Sender string // override From as SMTP envelope sender (optional)

Headers textproto.MIMEHeader

Attachments []*Attachment

ReadReceipt []string

}

 

调用Send方法发送邮件,第一个参数是你的发件人邮箱的SMTP域名+端口号,第二个参数用于身份认证

1

e.Send("smtp.163.com:25", smtp.PlainAuth("", "pingyeaa@163.com", "<你的密码>", "smtp.163.com"))

smtp.PlainAuth

CC与BCC

CC全称是Carbon Copy,意为抄送,BCC全称Blind Carbon Copy,意为暗抄送,收件人看不到被暗抄送给了谁。

e := email.NewEmail()

e.Cc = []string{"xxxxxxx@qq.com"}

e.Bcc = []string{"xxxxxxx@qq.com"}

另一种初始化方式

可以实例化的时候直接赋值

e := &email.Email{

From: "平也 <pingyeaa@163.com>",

To: []string{"xxxxxxx@qq.com"},

Subject: "发现惊天大秘密!",

Text: []byte("平也好帅好有智慧哦~"),

}

发送附件

发送附件非常简单,直接传入文件名即可

 

e.AttachFile("attachment.txt")

连接池

由于频繁发送邮件会不断的与SMTP服务器建立连接,比较影响性能,所以email提供了连接池的功能

auth := smtp.PlainAuth("", "pingyeaa@163.com", "<你的密码>", "smtp.163.com")

p, _ := email.NewPool("smtp.163.com:25", 4, auth)

创建成功后,就可以借助连接池来发送邮件

e := email.NewEmail()

e.From = "平也 <pingyeaa@163.com>"

e.To = []string{"xxxxxx@qq.com"}

e.Subject = "发现惊天大秘密!"

e.Text = []byte("平也好帅好有智慧哦~")

p.Send(e, 10*time.Second)

实例

 

package go_email

import (

"crypto/tls"

"fmt"

"Github.com/jordan-wright/email"

"log"

".NET/smtp"

"strings"

"time"

)

var (

pool *email.Pool

maxClient int = 10

)

func SendEmail(from string, to []string, secret string, host string, nickname string, subject string, body string, port int, ssl bool) error {

auth := smtp.PlainAuth("", from, secret, host)

e := email.NewEmail()

e.From = fmt.Sprintf("%s<%s>", nickname, from)

e.To = to

e.Subject = subject

e.HTML = []byte(body)

hostAddr := fmt.Sprintf("%s:%d", host, port)

if ssl {

return e.SendWithTLS(hostAddr, auth,&tls.Config{ServerName: host})

}

return e.Send(hostAddr, auth)

}

func SendEmailWithFile(from string, to []string, secret string, host string, nickname string, subject string, body string, port int, ssl bool,attach string) error {

auth := smtp.PlainAuth("", from, secret, host)

e := email.NewEmail()

e.From = fmt.Sprintf("%s<%s>", nickname, from)

e.To = to

e.Subject = subject

e.HTML = []byte(body)

if attach != ""{

_,_ = e.AttachFile(attach)

}

hostAddr := fmt.Sprintf("%s:%d", host, port)

if ssl {

return e.SendWithTLS(hostAddr, auth,&tls.Config{ServerName: host})

}

return e.Send(hostAddr, auth)

}

func SendEmailWithPool(to []string, from, secret, host, subject, body, nickname string, port int) (err error) {

hostAddr := fmt.Sprintf("%s:%d", host, port)

auth := smtp.PlainAuth("", from, secret, host)

if pool == nil {

pool, err = email.NewPool(hostAddr, maxClient, auth)

if err != nil {

log.Fatal(err)

}

}

e := &email.Email{

From: fmt.Sprintf("%s<%s>", nickname, from),

To: to,

Subject: subject,

Text: []byte(body),

}

return pool.Send(e, 5 * time.Second)

}

func SendEmailWithPoolAndFile(to []string, from, secret, host, subject, body, nickname string, port int, attach string) (err error) {

hostAddr := fmt.Sprintf("%s:%d", host, port)

auth := smtp.PlainAuth("", from, secret, host)

if pool == nil {

pool, err = email.NewPool(hostAddr, maxClient, auth)

if err != nil {

log.Fatal(err)

}

}

e := &email.Email{

From: fmt.Sprintf("%s<%s>", nickname, from),

To: to,

Subject: subject,

Text: []byte(body),

}

if attach != "" {

_, _ = e.AttachFile(attach)

}

return pool.Send(e, 5 * time.Second)

}

 

package main

import (

"fmt"

go_email "go_dev/go_email/email"

)

func main() {

//send_email_test1()

//send_email_test2()

//send_email_test3()

send_email_test4()

}

func send_email_test4() {

var to = []string{"15735177116@163.com", "1271570224@qq.com"}

from := "201800910862@b.sxmu.edu.cn"

nickname := "张亚飞"

secret := "xxxxxxxx"

host := "smtp.exmail.qq.com"

port := 25

subject := "Perfect Vue Admin 发送邮件测试"

body := "测试内容"

if err :=
go_email.SendEmailWithPoolAndFile(to, from, secret, host, subject, body, nickname, port, "简称.txt"); err != nil{

fmt.Println("发送失败: ", err)

}else {

fmt.Println("发送成功")

}

}

func send_email_test3() {

var to = []string{"15735177116@163.com", "201800910862@b.sxmu.edu.cn"}

from := "1271570224@qq.com"

nickname := "张亚飞"

secret := "vsloiltxbxyzgeii"

host := "smtp.qq.com"

port := 25

subject := "Perfect Vue Admin 发送邮件测试"

body := "测试内容"

if err :=
go_email.SendEmailWithPoolAndFile(to, from, secret, host, subject, body, nickname, port, "简称.txt"); err != nil{

fmt.Println("发送失败: ", err)

}else {

fmt.Println("发送成功")

}

}

func send_email_test2() {

to := "1271570224@qq.com;15735177116@163.com"

user := "201800910862@b.sxmu.edu.cn"

password := "xxxxxx3"

host := "smtp.exmail.qq.com:25"

//host := "smtp.exmail.qq.com"

subject := "Perfect Vue Admin 发送邮件测试"

body := "测试内容"

if err := go_email.SendEduEmail(user, password, host, to, subject, body, "html"); err != nil{

fmt.Println("发送失败: ", err)

}else {

fmt.Println("发送成功")

}

}

func send_email_test1() {

var to = []string{"15735177116@163.com", "201800910862@b.sxmu.edu.cn"}

from := "1271570224@qq.com"

nickname := "张亚飞"

secret := "xxxxxx"

host := "smtp.qq.com"

port := 25

subject := "Perfect Vue Admin 发送邮件测试"

body := "测试内容"

if err := go_email.SendEmail(from, to, secret, host, nickname, subject, body, port, true); err != nil{

fmt.Println("发送失败: ", err)

}else {

fmt.Println("发送成功")

}

 

四、常用邮箱服务器地址与端口

163.com: 

POP3服务器地址:pop.163.com(端口:110) 

SMTP服务器地址:smtp.163.com(端口:25)  

 

126邮箱:

POP3服务器地址:pop.126.com(端口:110) 

SMTP服务器地址:smtp.126.com(端口:25)

 

139邮箱: 

POP3服务器地址:POP.139.com(端口:110) 

SMTP服务器地址:SMTP.139.com(端口:25) 

 

QQ邮箱: 

POP3服务器地址:pop.qq.com(端口:110) 

SMTP服务器地址:smtp.qq.com (端口:25)  

 

QQ企业邮箱 :

POP3服务器地址:pop.exmail.qq.com (SSL启用 端口:995) 

SMTP服务器地址:smtp.exmail.qq.com(SSL启用 端口:587/465)  

 

gmail(google.com) :

POP3服务器地址:pop.gmail.com(SSL启用 端口:995) 

SMTP服务器地址:smtp.gmail.com(SSL启用 端口:587) 

 

Foxmail: 

POP3服务器地址:POP.foxmail.com(端口:110) 

SMTP服务器地址:SMTP.foxmail.com(端口:25) 

 

sina.com: 

POP3服务器地址:pop3.sina.com.cn(端口:110) 

SMTP服务器地址:smtp.sina.com.cn(端口:25)

 

sinaVIP: 

POP3服务器:pop3.vip.sina.com (端口:110) 

SMTP服务器:smtp.vip.sina.com (端口:25)  

 

sohu.com: 

POP3服务器地址:pop3.sohu.com(端口:110) 

SMTP服务器地址:smtp.sohu.com(端口:25)  

 

yahoo.com: 

POP3服务器地址:pop.mail.yahoo.com 

SMTP服务器地址:smtp.mail.yahoo.com  

 

yahoo.com.cn: 

POP3服务器地址:pop.mail.yahoo.com.cn(端口:995) 

SMTP服务器地址:smtp.mail.yahoo.com.cn(端口:587  )

 

HotMail :

POP3服务器地址:pop3.live.com (端口:995) 

SMTP服务器地址:smtp.live.com (端口:587)

   

263.net: 

POP3服务器地址:pop3.263.net(端口:110) 

SMTP服务器地址:smtp.263.net(端口:25)  

 

263.net.cn: 

POP3服务器地址:pop.263.net.cn(端口:110) 

SMTP服务器地址:smtp.263.net.cn(端口:25)  

 

x263.net: 

POP3服务器地址:pop.x263.net(端口:110) 

SMTP服务器地址:smtp.x263.net(端口:25) 

 

21cn.com: 

POP3服务器地址:pop.21cn.com(端口:110) 

SMTP服务器地址:smtp.21cn.com(端口:25)   


china.com: 

POP3服务器地址:pop.china.com(端口:110) 

SMTP服务器地址:smtp.china.com(端口:25)

  
tom.com: 

POP3服务器地址:pop.tom.com(端口:110) 

SMTP服务器地址:smtp.tom.com(端口:25)

  
etang.com: 

POP3服务器地址:pop.etang.com 

SMTP服务器地址:smtp.etang.com
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