var smtpConfig = {
    host: 'smtp.gmail.com',
    port: 465,
      auth: {
        user: mailconfig.email,
        pass: mailconfig.password
    },
    //proxy config
    // assumes a HTTP proxy running on port 3128
    proxy: 'http://192.168.2.1:3128'
};

var smtptransport=nodemailer.createTransport(smtpConfig);