$body = "Name:{$name}\n\nWebsite :{$web}\n\nComments:{$body}";

with

    $body = "Name:{$name}\n\nEmail:{$email}\n\nWebsite :{$web}\n\nComments:{$body}";

<?php

$name = $_POST['name']; // contain name of person
$email = $_POST['email']; // Email address of sender
$web = $_POST['web']; // Your website URL
$body = $_POST['text']; // Your message
$receiver = "PUT YOUR EMAIL HERE" ; // hardcord your email address here - This is the email address that all your feedbacks will be sent to
if (!empty($name) & !empty($email) && !empty($body)) {
    $body = "Name:{$name}\n\nWebsite :{$web}\n\nComments:{$body}";
	$send = mail($receiver, 'Contact Form Submission', $body, "From: {$email}");
    if ($send) {
        echo 'true'; //if everything is ok,always return true , else ajax submission won't work
    }

}

?>

For those of you running into the issue of not knowing where to put your e-mail address replace the downloaded ajaxsubmit.php code with this:

The code from the downloaded source is missing the $receiver information. Put your e-mail address where it says PUT YOUR EMAIL HERE.

Also, when testing your form use a valid e-mail address as the testing e-mail because I noticed the form will not send anything if the e-mail address isn’t valid.. ex. test@test.com won’t work

Hope that helps!