var transporter = nodemailer.createTransport(smtpTransport({
          service: 'gmail',
          host : 'smtp.gmail.com',
          auth: {
            user: 'sidharthramanan@gmail.com',
            pass: '*******'
          }
        }));

        var mailOptions = {
          from: 'sidharthramanan@gmail.com',
          to: example@hotmail.com,
          subject: 'Email via Nodemailer',
          text: 'You've received an email via Nodemailer!'
        };

        transporter.sendMail(mailOptions, function(error, info){
          if (error) {
            console.log(error);
          } else {
            response.send("email sent successfully");
          }
        });