Quick Start: Use Go language functions to implement simple email sending function

Quick Start: Use Go language functions to implement simple email sending functions

Introduction: With the development of the Internet, email has become an indispensable communication tool in people's daily life and work. This article will introduce how to use Go language functions to implement a simple email sending function, and provide code examples to help readers get started quickly.

1. Preparation
Before we start, we need to make preparations. First, make sure your computer has the Go language environment installed and has a valid SMTP server and a valid email account (including SMTP server address, port number, email account and password).

2. Import package
Go language provides a built-in smtp package for interaction with the SMTP server. We first need to import the package and create an smtp client.

package main

import (
    "net/smtp"
)

3. Define the email sending function
Next, we need to define an email sending function. This function will receive the recipient's email address, email title, and email content as parameters, and use the relevant methods in the smtp package to send the email.

func sendMail(to string, subject string, body string) error {
    // 使用smtp服务器地址和端口号进行连接
    smtpServer := "smtp.example.com"
    smtpPort := "587"
    auth := smtp.PlainAuth("", "your_email@example.com", "your_password", smtpServer)

    // 构建邮件内容
    message := []byte("To: " + to + "
" +
        "Subject: " + subject + "
" +
        "Content-Type: text/html; charset=UTF-8" + "
" +
        "
" +
        body)

    // 发送邮件
    err := smtp.SendMail(smtpServer+":"+smtpPort, auth, "your_email@example.com", []string{to}, message)
    if err != nil {
        return err
    }

    return nil
}

4. Call the email sending function
Finally, we can call the email sending function in the main function and pass in the relevant parameters.

func main() {
    err := sendMail("recipient@example.com", "测试邮件", "<h1>这是一封测试邮件</h1>")
    if err != nil {
        fmt.Println("邮件发送失败:", err)
        return
    }

    fmt.Println("邮件发送成功！")
}

5. Run the program
Save the above code as a go file and run the file on the command line. If everything is fine, you will see the output as "Email sent successfully!".

6. Summary
This article introduces how to use Go language functions to implement a simple email sending function. The entire process is completed by importing the smtp package, defining the email sending function and calling the function. I hope that through the explanation and code examples of this article, readers can quickly get started with the email sending function of Go language. If you encounter any problems, you can refer to the official Go language documentation or seek help from the community.

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