PHP Contact form error sending email - php

Question

I currently have a contact form on my index.html & contact.html pages. When testing the PHP contact form they do not send me an email or give any notification that the message has been sent, just appearing to do nothing.
HTML
<div class="form">
<form action="php/contact.php" method="post">
<h5 class="grey-bg text-center iq-font-black iq-tw-6 iq-pall-20">Service Inquiry</h5>
<div class="iq-pall-30">
<div class="row">
<div class="col-sm-12 iq-mtb-10">
<div class="section-field">
<input name="name" placeholder="Name" id="name" type="text">
</div>
</div>
<div class="col-sm-12 iq-mtb-10">
<div class="section-field">
<input name="email" placeholder="Email" id="email" type="text">
</div>
</div>
<div class="col-sm-12 iq-mtb-10">
<div class="section-field">
<select name="service" id="service">
<option value="Choose Service" >Choose Service</option>
<option value="test1" >test1</option>
<option value="test" >Test</option>
<span class="error">A service is required</span>
</select>
</div>
</div>
<div class="col-sm-12 iq-mtb-10">
<div class="section-field">
<input name="phonenumber" placeholder="Phone Number" id="phonenumber" type="text">
</div>
</div>
<div class="col-sm-12 iq-mtb-10">
<div class="section-field ">
<textarea class="form-control" placeholder="Comment" rows="5" id="comment" style="resize: none;"></textarea>
</div>
</div>
<div class="col-sm-12 iq-mtb-10">
<button id="submit" name="submit" type="submit" value="Send" class="button pull-right iq-mt-20">Send Message</button>
</div>
</div>
</div>
</form>
</div>
PHP Code
<?php $ToEmail = 'test#test.com';
$EmailSubject = 'User Contact Information';
$mailheader = "From: ".$_POST["email"]."\r\n";
$mailheader .= "Reply-To: ".$_POST["email"]."\r\n";
$mailheader .= "Service: ".$_POST["service"]."\r\n";
$mailheader .= "Content-type: text/html; charset=iso-8859-1\r\n";
$MESSAGE_BODY = "Name: ".$_POST["name"]."";
$MESSAGE_BODY .= "Email: ".$_POST["email"]."";
$MESSAGE_BODY .= "Service: ".$_POST["service"]."";
$MESSAGE_BODY .= "Phone: ".$_POST["phone"]."";
$MESSAGE_BODY .= "Comment: ".nl2br($_POST["message"])."";
mail($ToEmail, $EmailSubject, $MESSAGE_BODY, $mailheader) or die ("Failure");?>
The email's I do receive are like this:
User Contact Information
Name: Email: Phone: Comment:
Do the fields match the PHP form, and the send message button, how can that have a response for if the email has been sent or not?

Answer 1

A couple errors:
Your <div class="iq-pall-30"> and <div class="row"> elements are unclosed, which make your markup invalid and might affect the output you're getting to your PHP script.
You reference form elements that doesn't actually exist in your form:
$_POST["phone"] is probably supposed to be a reference to your HTML form element <input type="text" name="phonenumber">. You'll have to change your variable reference to $_POST["phonenumber"] to correctly retrieve the data.
$_POST["message"] is probably supposed to be a reference to your textarea form element, but you haven't assigned a name to that element in your markup. You should add name="message" as an attribute of the textarea in order to correctly retrieve that data.