How to send email in golang

golang Email Sending

In recent years, as cloud computing technology has become increasingly mature, email service has become an indispensable communication tool in online business systems. For Golang developers, how to implement the email sending function in the application has become an issue that needs attention. This article will introduce the basic process and code implementation of golang email sending.

Basic process

Processing email sending in golang is mainly divided into the following steps:

1. Create an SMTP client connection;
2. Use The client's Auth method performs email verification;
3. Fill in the basic information of the email, such as sender, recipient, subject, etc.;
4. Edit the email body content;
5. Call The Send method sends an email;
6. Close the SMTP client connection.

Implementation code

The following is a simple example code for sending golang emails:

package main

import (
    "fmt"
    "net/smtp"
)

func main() {
    // 配置信息
    userName := "xxx@xxx.com" // 邮箱账户
    password := "********" // 邮箱密码
    host := "smtp.exmail.qq.com" // 邮箱SMTP服务器
    toEmail := "xxx@xxx.com" // 收件人邮箱
    subject := "测试邮件" // 邮件主题
    body := "这是一封测试邮件。" // 邮件正文内容

    // 服务器认证信息
    auth := smtp.PlainAuth("", userName, password, host)

    // 邮件内容
    msg := []byte(fmt.Sprintf("To: %s
Subject: %s

%s", toEmail, subject, body))

    // 发送邮件
    err := smtp.SendMail(host+":25", auth, userName, []string{toEmail}, msg)
    if err != nil {
        fmt.Println("邮件发送失败：", err)
        return
    }
    fmt.Println("邮件发送成功！")
}

In the above code, the corresponding configuration information needs to be modified according to the actual situation. Among them, the auth variable is the return value of smtp.PlainAuth, which is used for email verification. The msg variable is the email content, which contains recipient, subject, body and other information.

It should be noted that the port number of the SMTP server may be different due to different email services. If the sending fails due to an incorrect port number in the application, you can try to correct it by adjusting the port number.

Summary

Golang’s email sending is mainly implemented using the smtp package. The email sending function can be realized through simple program design and configuration. In practical applications, you need to pay attention to key details such as the format of the email content, the management of the recipient list, and the address and port of the SMTP server. Through continuous trial and iteration, a stable and efficient email sending system can be created to provide a better online experience for application users.

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