nodemailer没有从node server发送电子邮件吗？

npm install nodemailer

const nodemailer = require('nodemailer');

// 创建一个传输对象
let transporter = nodemailer.createTransport({
    host: 'smtp.example.com',
    port: 587,
    secure: false, // true for 465, false for other ports
    auth: {
        user: 'user@example.com',
        pass: 'password'
    }
});

// 配置邮件选项
let mailOptions = {
    from: 'sender@example.com',
    to: 'recipient@example.com',
    subject: 'Hello',
    text: 'Hello world!'
};

// 发送邮件
transporter.sendMail(mailOptions, (error, info) => {
    if (error) {
        console.log(error);
    } else {
        console.log('Email sent: ' + info.response);
    }
});