npm install nodemailer --save

var nodemailer = require('nodemailer');

// create reusable transporter object using the default SMTP transport
var transporter = nodemailer.createTransport('smtps://user%40gmail.com:pass@smtp.gmail.com');

// setup e-mail data with unicode symbols
var mailOptions = {
  from: 'Fred Foo 👥 <foo@blurdybloop.com>', // sender address
  to: 'bar@blurdybloop.com, baz@blurdybloop.com', // list of receivers
  subject: 'Hello ✔', // Subject line
  text: 'Hello world 🐴', // plaintext body
  html: '<b>Hello world 🐴</b>' // html body
};

// send mail with defined transport object
transporter.sendMail(mailOptions, function(error, info){
  if(error){
    return console.log(error);
  }
  console.log('Message sent: ' + info.response);
});

{ [AuthError: Invalid login - 454 Authentication failed, please open smtp flag first!]
 name: 'AuthError',
 data: '454 Authentication failed, please open smtp flag first!',
 stage: 'auth' }

{ [SenderError: Mail from command failed - 501 mail from address must be same as authorization user]
 name: 'SenderError',
 data: '501 mail from address must be same as authorization user',
 stage: 'mail' }