这是我的nodemailer程序，即使我给错误的邮件在TO地址也显示消息发送如何纠正。

Question

const nodemailer = require('nodemailer');

let mailTransporter = nodemailer.createTransport({
  host: 'smtp.gmail.com',
  port: 587,
  secure: false,
  auth: {
    user: '*************',
    pass: '*********',
  },
});

let mailDetails = {
  from: '********',
  to: 'uuwdwuvw@', //guguygugiug
  subject: 'Test mail',
  //text: 'redeem your gift',
  html: 'redeem your coupon code ',
};

mailTransporter.sendMail(mailDetails, function (err, data) {
  if (err) {
    console.log('Error Occurs');
  } else {
    console.log('Email sent successfully');
  }
});