Server.js

var express=require('express');
var nodemailer = require("nodemailer");
var app=express();
/*
	Here we are configuring our SMTP Server details.
	STMP is mail server which is responsible for sending and recieving email.
*/
var smtpTransport = nodemailer.createTransport({
    service: "Gmail",
    auth: {
        user: "",
        pass: ""
    }
});
var rand,mailOptions,host,link;
/*------------------SMTP Over-----------------------------*/

/*------------------Routing Started ------------------------*/

app.get('/',function(req,res){
	res.sendfile('index.html');
});
app.get('/send',function(req,res){
        rand=Math.floor((Math.random() * 100) + 54);
	host=req.get('host');
	link="http://"+req.get('host')+"/verify?id="+rand;
	mailOptions={
		to : req.query.to,
		subject : "Please confirm your Email account",
		html : "Hello,<br> Please Click on the link to verify your email.<br><a href="+link+">Click here to verify</a>"	
	}
	console.log(mailOptions);
	smtpTransport.sendMail(mailOptions, function(error, response){
   	 if(error){
        	console.log(error);
		res.end("error");
	 }else{
        	console.log("Message sent: " + response.message);
		res.end("sent");
    	 }
});
});

app.get('/verify',function(req,res){
console.log(req.protocol+":/"+req.get('host'));
if((req.protocol+"://"+req.get('host'))==("http://"+host))
{
	console.log("Domain is matched. Information is from Authentic email");
	if(req.query.id==rand)
	{
		console.log("email is verified");
		res.end("<h1>Email "+mailOptions.to+" is been Successfully verified");
	}
	else
	{
		console.log("email is not verified");
		res.end("<h1>Bad Request</h1>");
	}
}
else
{
	res.end("<h1>Request is from unknown source");
}
});

/*--------------------Routing Over----------------------------*/

app.listen(3000,function(){
	console.log("Express Started on Port 3000");
});