var api_id = 'your_api_id';
var api_key = 'your_api_key';
var recipientEmailAddress = 'your_email@your_domain.com';

var sendgrid = require("sendgrid")(api_id, api_key);
var express = require('express');
var app     = express();

// Allow webserver to serve static files
app.use(express.static(__dirname));

// Serve the web-form when the browser requests localhost:8080
app.all('/', function (req, res) {
    res.sendFile('index.html', { root: __dirname });
});

// Run this function when the web form is submitted.
app.post('/email', function (req, res) {
    // Create email, set some attributes, and send it off!
    var email = new sendgrid.Email();

    email.addTo(recipientEmailAddress);
    email.setFrom(req.query.address);
    email.setSubject(req.query.subject);
    email.setHtml(req.query.message);

    sendgrid.send(email);
});

// Give this app a port to listen to.
app.listen(8080);

console.log('Listening to 8080');