Nodemailer usage in Nodejitsu

jitsu.js

var http = require('http'),
    nodemailer = require('nodemailer');

var smtpTransport = nodemailer.createTransport("SMTP",{
    service: "Gmail",
    auth: {
        user: "{user}",
        pass: "{pass}"
    }
});

var mailOptions = {
    from: "{sender}",
    to: "{receiver}",
    subject: "Hello ✔",
    text: "Hello world ✔",
    html: "<b>Hello world ✔</b>"
}

http.createServer(function (req, res) {
  
    res.writeHead(200, {'Content-Type': 'text/plain'});

    // send mail for every request
    smtpTransport.sendMail(mailOptions, function(error, response){
        if(error){
            res.end(error.message || error);
        }else{
            res.end("Message sent: " + response.message);
        }
    });

}).listen(8080);