Protect fake email 

function validate_email() {

var request;

try {

request= new XMLHttpRequest();

}

catch (tryMicrosoft) {

try {

request= new ActiveXObject("Msxml2.XMLHTTP");
}

catch (otherMicrosoft) 
{
try {
request= new ActiveXObject("Microsoft.XMLHTTP");
}

catch (failed) {
request= null;
}
}
}

var url= "https://www.g3techdesign.com/includes/email_checker.php";
var emailaddress= document.getElementById("enter_email").value;
var vars= "email="+emailaddress;
request.open("POST", url, true);

request.setRequestHeader("Content-type", "application/x-www-form-urlencoded");

request.onreadystatechange= function() {
if (request.readyState == 4 && request.status == 200) {
	var return_data=  request.responseText;
	document.getElementById("validate_email").innerHTML= return_data;
}
}

request.send(vars);
}

$(document).ready(function(){
  $('#footer_email').keyup(function(){ 
  var email = $(this).val();
  let regExp = /^[^ ]+@[^ ]+\.[a-z]{2,3}$/;
  var EmailAvailResult = $('#validate_email');
  if(email.length > 10) {
  if(email.match(regExp)) {
  document.getElementById("footer_email").style.borderColor = "#3c763d"; 
  document.getElementById("footer_email").style.background = "#dff0d8";
  document.getElementById("footer_email").style.color = "#3c763d";
  EmailAvailResult.html('');
  }else{
    document.getElementById("footer_email").style.borderColor = "#e74c3c";
    document.getElementById("footer_email").style.background = "#fceae9";
    document.getElementById("footer_email").style.color = "#a94442";
    EmailAvailResult.html('<span class="errorss"><i class="fas fa-times-circle"></i></span> <font color="red">Please enter a valid email</font>');
}
}else{
    EmailAvailResult.html('<span class="wait">&#9997;</span> Please enter your email address');
}
if(email.length == 0) {
EmailAvailResult.html('');
}
  });
  
$('#enter_email').keyup(function(){ 
  var email = $(this).val();
  let regExp = /^[^ ]+@[^ ]+\.[a-z]{2,3}$/;
  var EmailAvailResult = $('#validate_email');
  if(email.length > 10) {
  if(email.match(regExp)) {
  document.getElementById("enter_email").style.borderColor = "#3c763d"; 
  document.getElementById("enter_email").style.background = "#dff0d8";
  document.getElementById("enter_email").style.color = "#3c763d";
  EmailAvailResult.html('');
  }else{
    document.getElementById("enter_email").style.borderColor = "#e74c3c";
    document.getElementById("enter_email").style.background = "#fceae9";
    document.getElementById("enter_email").style.color = "#a94442";
    EmailAvailResult.html('<span class="errorss"><i class="fas fa-times-circle"></i></span> <font color="red">Please enter a valid email</font>');
}
}else{
    EmailAvailResult.html('<span class="wait">&#9997;</span> Please enter your email address');
}
if(email.length == 0) {
EmailAvailResult.html('');
}
  });  
  
});