index.js

require('dotenv').config();

const express = require('express');
const bodyParser = require('body-parser');
const nodemailer = require('nodemailer');
const cors = require('cors');

const app = express();

app.use(cors());

// body parser middleware
app.use(bodyParser.urlencoded({ extended: false }));
app.use(bodyParser.json());

app.post('/send', async ({ body: { name, email, bodyText } }, res) => {
  try {
    const output = `
      <p>Email from My Portfolio</p>
      <h3>Contact Details</h3>
      <ul>
        <li>Name: ${name}</li>
        <li>Email: ${email}</li>   
      </ul>
      <h3>Message</h3>
      <p>${bodyText}</p>
      `;

    const { EMAIL, PASSWORD } = process.env;
    // create reusable transporter object using the default SMTP transport
    const transporter = nodemailer.createTransport({
      service: 'gmail',
      auth: {
        user: EMAIL,
        pass: PASSWORD,
      },
    });

    // send mail with defined transport object
    const info = await transporter.sendMail({
      from: `"Personal Portfolio Contact" <${EMAIL}>`, // sender address
      to: EMAIL, // list of receivers
      subject: 'Message from Portfolio', // Subject line
      text: 'Hello world?', // plain text body
      html: output, // html body
    });

    console.log('Message sent: %s', info.messageId);
    // Message sent: <b658f8ca-6296-ccf4-8306-87d57a0b4321@example.com>

    // Preview only available when sending through an Ethereal account
    console.log('Preview URL: %s', nodemailer.getTestMessageUrl(info));
    // Preview URL: https://ethereal.email/message/WaQKMgKddxQDoou...

    res.send({ msg: 'Email has been sent' });
  } catch (err) {
    console.error(err);
  }
});

app.listen(process.env.PORT || 5000, () => {
  console.log('Running Server on port 5000');
});