nodemailerSendMail.js

var nodemailer = require('nodemailer');

//send mail using nodemailer via gmail service  
var transporter = nodemailer.createTransport({
  service: 'gmail',
  auth: {
    user: 'yourEmail',
    pass: 'yourPassword'
  }
});

var mailOptions = {
  from: 'mail Id of From',
  to: 'mail Id to To',
  subject: 'Sending Email using Node.js',
  text: 'That was easy!',
  text: 'Hello world?', // plain text body
  html: '<b>Hello world?</b>'
};

transporter.sendMail(mailOptions, function(error, info){
  if (error) {
    console.log(error);
  } else {
    console.log('Email sent: ' + info.response);
  }
});