javascript — контактная форма Ajax php нет электронной почты

Не получается заставить этот код работать, он говорит, что отправляет электронное письмо, но где-то в строке он застрял. у меня нет доступа к журналам в данный момент с хоста, поэтому не могу проверить, и это должно посылать электронные письма с моей точки зрения и в данный момент

//check if its an ajax request, exit if not
if(!isset($_SERVER['HTTP_X_REQUESTED_WITH']) AND strtolower($_SERVER['HTTP_X_REQUESTED_WITH']) != 'xmlhttprequest') {

//exit script outputting json data
$output = json_encode(
array(
'type'=>'error',
'text' => 'Request must come from Ajax'
));

die($output);
}

//check $_POST vars are set, exit if any missing
if(!isset($_POST["userName"]) || !isset($_POST["userEmail"]) || !isset($_POST["userMessage"]))
{
$output = json_encode(array('type'=>'error', 'text' => 'The input fields are empty!'));
die($output);
}

//Sanitize input data using PHP filter_var().
$user_Name        = filter_var($_POST["userName"], FILTER_SANITIZE_STRING);
$user_Email       = filter_var($_POST["userEmail"], FILTER_SANITIZE_EMAIL);
$user_Phone             = $_POST["userTelephone"];
$user_Message     = filter_var($_POST["userMessage"], FILTER_SANITIZE_STRING);

//additional php validation
if(strlen($user_Name)<3) // If length is less than 3 it will throw an HTTP error.
{
$output = json_encode(array('type'=>'error', 'text' => 'Name field can not be empty'));
die($output);
}
if(!filter_var($user_Email, FILTER_VALIDATE_EMAIL)) //email validation
{
$output = json_encode(array('type'=>'error', 'text' => 'Please use a valid email address'));
die($output);
}

if(strlen($user_Message)<5) //check emtpy message
{
$output = json_encode(array('type'=>'error', 'text' => 'Please enter a message'));
die($output);
}$message_Body = "<strong>Name: </strong>". $user_Name ."<br>";
$message_Body .= "<strong>Email: </strong>". $user_Email ."<br>";
$message_Body .= "<strong>Phone: </strong>". $user_Phone ."<br>";
$message_Body .= "<strong>Message: </strong>". $user_Message ."<br>";$headers = "From: " . strip_tags($user_Email) . "\r\n";
$headers .= "Reply-To: ". strip_tags($user_Email) . "\r\n";
$headers .= "MIME-Version: 1.0\r\n";
$headers .= "Content-Type: text/html; charset=ISO-8859-1\r\n";//proceed with PHP email.
$headers = 'From: '.$user_Email.'' . "\r\n" .
'Reply-To: '.$user_Email.'' . "\r\n" .
'X-Mailer: PHP/' . phpversion() . "\r\n" .
'Content-type: text/html';$sentMail = @mail($to_Email, $subject, $message_Body, $headers);

if(!$sentMail)
{
$output = json_encode(array('type'=>'error', 'text' => 'An error has occurred, please try again'));
die($output);
}else{
$output = json_encode(array('type'=>'message', 'text' => 'Hello '.$user_Name .'Thanks for your contact we will return soon.'));
die($output);
}
}

вот JS

  $("#submit_btn").click(function() {
//get input field values
var user_name       = $('input[name=name]').val();
var user_email      = $('input[name=email]').val();
var user_telephone      = $('input[name=phone]').val();
var user_message    = $('textarea[name=message]').val();

//simple validation at client's end
var post_data, output;
var proceed = true;
if(user_name==""){
proceed = false;
}
if(user_email==""){
proceed = false;
}
if(user_message=="") {
proceed = false;
}

//everything looks good! proceed...
if(proceed)
{
//data to be sent to server
post_data = {'userName':user_name, 'userEmail':user_email, 'userTelephone':user_telephone, 'userMessage':user_message};

//Ajax post data to server
$.post('contact.php', post_data, function(response){

//load json data from server and output message
if(response.type == 'error')
{
output = '<div class="alert-danger" style="padding:10px; margin-bottom:25px;">'+response.text+'</div>';
}else{
output = '<div class="alert-success" style="padding:10px; margin-bottom:25px;">'+response.text+'</div>';

//reset values in all input fields
$('#form-elements input').val('');
$('#form-elements textarea').val('');
}

$("#result").hide().html(output).slideDown();
}, 'json');

}
});

//reset previously set border colors and hide all message on .keyup()
$("#form-elements input, #form-elements textarea").keyup(function() {
$("#result").slideUp();
});

HTML

  <form id="form-elements" onSubmit="return false">
<div class="row">
<div class="col-md-12 center"><div id="result"> </div> </div>
</div>

<div class="row">
<div class="col-sm-4">
<div class="form-group">
<input type="text" class="form-control" placeholder="Namn" name="name" id="name" required></div>
</div>
<div class="col-sm-4">
<div class="form-group">
<input type="email" class="form-control" placeholder="Email Adress" name="email" id="email" required></div>
</div>
<div class="col-sm-4">
<div class="form-group">
<input type="text" class="form-control" placeholder="Telefon nummer" name="phone" id="phone" required>
</div>
</div>
<div class="col-xs-12">
<textarea id="input" class="form-control" rows="7" required="required" placeholder="Meddelande" name="message" id="message" ></textarea>
</div>
<button type="submit" class="btn btn-default buttons" id="submit_btn">Skicka</button>
</div>
</form>