npm install nodemailer
const nodemailer = require('nodemailer');
const mailOptions = {from, to, subject, text};
const transporter = nodemailer.createTransport({
service: 'gmail',
auth: {user, pass},
});
transporter.sendMail(mailOptions, function(error, info){
if (error) {
console.log(error);
} else {
console.log(info.response);
}
});