Golang sends email to the mail Library

Golang Send mail Library email

• golang There is one in itself SMTP agreement , But the configuration of this protocol is more complex , So we use a third-party library to realize .

Humanized golang Email Library

• email The packaging design is easy to use , Flexible enough . No restrictions . It is a very humanized golang Mail Library

• email The library now supports the following

  • Sender , The recipient , BCC and CC fields
  • “[email protected]” and “[email protected]” Format email address
  • The text and HTML Message body
  • The attachment
  • Reading receipt

Install and use

go get github.com/jordan-wright/email

• ️：email The version of this library >1 need Go1.5 Or later
• ️： If you need to work with previous Go Version is compatible with , have access to gopkg.in/jordan-wright/email.v1 The previous package in

Case study

Use QQ Send email

package main

import (
	"github.com/jordan-wright/email"
	"net/smtp"
)

func main() {
    
	// Instantiation returns a structure 
	e := email.NewEmail()
	//From： Who sent it 
	e.From = "Crisp <[email protected]>"
	//To： To whom 
	e.To = []string{
    "[email protected]"}
	// CC , This place CC means , Who else can this email be copied to after it is sent 
	e.Bcc = []string{
    "[email protected]"}
	e.Cc = []string{
    "[email protected]"}
	// The theme , title 
	e.Subject = " test golang email library "
	// General text content , Support html
	e.Text = []byte(" Children ！！！")
	e.HTML = []byte("<h1>html  Children ！！！</h1>")
	//send Method ：smtp.qq.com:587：QQ email Relevant domain name port number  smtp.PlainAuth： The first parameter is empty , The second parameter is your mailbox , The third parameter is authorization code , Here is how to get the authorization code 
	err := e.Send("smtp.qq.com:587", smtp.PlainAuth("", "[email protected]", " Authorization code ", "smtp.qq.com"))
	if err != nil {
    
		return
	}
}

• How to get the authentication password

  

  

Create structure directly create email

package main

import (
	"github.com/jordan-wright/email"
	"net/smtp"
	"net/textproto"
)

func main() {
    
	e := &email.Email{
    
		To:      []string{
    "[email protected]"},
		From:    "Crisp <[email protected]>",
		Subject: " test golang email library ",
		Text:    []byte(" Children ！！！"),
		HTML:    []byte("<h1>html  Children ！！！</h1>"),
		Headers: textproto.MIMEHeader{
    },
	}
	//send Method ：smtp.qq.com:587：QQ email Relevant domain name port number  smtp.PlainAuth： to grant authorization   The third parameter authorization code needs attention , It tells how to get the authorization code 
	err := e.Send("smtp.qq.com:587", smtp.PlainAuth("", "[email protected]", " Authorization code ", "smtp.qq.com"))
	if err != nil {
    
		return
	}
}

Io.Reader Create email

o.Reader Any type that implements this interface creates an email email.NewEmailFromReader

Additional documents

e := NewEmail()
e.AttachFile("test.txt")

Use connection pooling to send large amounts of mail

(var ch <-chan *email.Email)
p := email.NewPool(
	"smtp.gmail.com:587",
	4,
	smtp.PlainAuth("", "[email protected]", "ryqnogv3456dmaceiha", "smtp.qq.com"),
)
for i := 0; i < 4; i++ {
    
	go func() {
    
		for e := range ch {
    
			err := p.Send(e, 10*time.Second)
			if err != nil {
    
				return 
			}
		}
	}()
}