尝试通过反应获取 ERR_TOO_MANY_REDIRECTS 和 createError.js:16 Uncaught (in promise) 来设置 nodemailer 错误：网络错误

Question

按照教程 https://medium.com/verclaire-nine/how-to-build-a-contact-form-with-react-and-nodemailer-3ca105eff797 尝试设置 nodemailer 并为我的投资组合的联系表单做出反应。获取错误 net::ERR_TOO_MANY_REDIRECTS 和 createError.js:16 Uncaught (in promise) Error: Network Error。 cors 是必需的，但没有被使用，我不确定这是问题所在还是我输入的错误。

server.js 看起来像这样：

const express = require('express');
const nodemailer = require('nodemailer');
const cors = require('cors');
const app = express();
require("dotenv").config();

let transporter = nodemailer.createTransport({
  host: "smtp.Millhousekevin@gmail.com",
  port: 587,
  auth: {
    user: process.env.EMAIL,
    pass: process.env.PASSWORD
  }
});

transporter.verify(function(error, success) {
  if (error) {
    console.log(error);
  } else {
    console.log("Server is ready to take our messages");
  }
});
app.post('/send', (req, res, next) => {
  var name = req.body.name
  var email = req.body.email
  var subject = req.body.subject
  var message = req.body.message
  var content = `name: ${name} \n email: ${email} \n subject: ${subject} \n message: ${message} `

  var mail = {
    from: name,
    to: "Millhousekevin@gmail.com",
    subject: subject,
    text: content
  }

  transporter.sendMail(mail, (err, data) => {
    if (err) {
      res.json({
        status: 'fail'
      })
    } else {
      res.json({
       status: 'success'
      })
    }
  })
})

app.listen(3030, () => {
  console.log('server start on port 3030');
});