[Notify php script help]

Hi guys, I am redesigning my website, I want my visitors to keep upto date with things, and would like a 'get notified' email form, where users enter their email address and once the website is finised, they will get a email about it. So far, I have 3 lots of code, but I am getting an error when I upload the files to my server and try - 'Oops. Looks like something went wrong. Please try again later'.

 

Can someone take a look and see where I have gone wrong

 

This is my form code

<form action="notify-me.php" id="notifyMe" method="POST">

                                        <div class="form-group">
                                            <div class="controls">
                                                <input type="text" id="mail-sub" name="email" placeholder="Write your email and stay tuned!" class="form-control email srequiredField">
                                                <button class="btn btn-lg submit">Subscribe</button>
                                            </div>
                                        </div>

                                    </form>

This is my php code notify-me.php

<?php

## CONFIG ##

# LIST EMAIL ADDRESS
$recipient = "myemail@address.com";

# SUBJECT (Subscribe/Remove)
$subject = "Subscribe";

## FORM VALUES ##

# SENDER - WE ALSO USE THE RECIPIENT AS SENDER IN THIS SAMPLE
# DON'T INCLUDE UNFILTERED USER INPUT IN THE MAIL HEADER!
$sender = $recipient;

# MAIL BODY
$body .= "Name: ".$_REQUEST['Name']." \n";
# add more fields here if required

## SEND MESSGAE ##

mail( $recipient, $subject, $body, "From: $sender" ) or die ("Mail could not be sent.");

## SHOW RESULT PAGE ##


?>

and finally, my JS file

/*
 notifyMe jQuery Plugin v1.0.0
 Copyright (c)2014 Sergey Serafimovich
 Licensed under The MIT License.
*/
(function(e){e.fn.notifyMe=function(t){var n=e.extend({msgError404:"Service is not available at the moment. Please check your internet connection or try again later.",msgError503:"Oops. Looks like something went wrong. Please try again later.",msgErrorValidation:"This email address looks fake or invalid. Please enter a real email address.",msgErrorFormat:"Your e-mail address is incorrect. Please check it and try again.",msgSuccess:"Congrats! You are on list. We will inform you as soon as we finish."},t);var r=e(this);var i=e(this).find("input[name=email]");var s=e(this).attr("action");var o=e(this).find(".note");var u=e("<p class='message'></p>").appendTo(e(this));var a=e("<i></i>");var f="fa fa-spinner fa-spin";var l="fa fa-check-circle";var c="fa fa-exclamation-circle";i.after(a);e(this).on("submit",function(t){t.preventDefault();var h=i.val();var p=/^(([^<>()[\]\\.,;:\s@\"]+(\.[^<>()[\]\\.,;:\s@\"]+)*)|(\".+\"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/;if(p.test(h)){a.removeClass();a.addClass(f);e(this).removeClass("error success");u.text("");o.show();e.ajax({type:"POST",url:s,data:{email:h},dataType:"json",error:function(e){r.addClass("error");o.hide();a.removeClass();a.addClass(c);if(e.status==404){u.text(n.msgError404)}else{u.text(n.msgError503)}}}).done(function(e){o.hide();if(e.status=="success"){r.addClass("success-full").removeClass("bad-email");a.removeClass();a.addClass(l);u.text(n.msgSuccess)}else{r.addClass("error");a.removeClass();a.addClass(c);if(e.type=="ValidationError"){u.text(n.msgErrorValidation)}else{u.text(n.msgError503)}}})}else{e(this).addClass("bad-email");o.hide();a.removeClass();a.addClass(c);u.text(n.msgErrorFormat)}})}})(jQuery)