These are the only codes i am using to create the contact form at the minute.

Contact.php

<?php
$field_name = $_POST['cf_name'];
$field_email = $_POST['cf_email'];
$field_message = $_POST['cf_message'];

$mail_to = 'mail@markblackler.com';
$subject = 'Message from a site visitor '.$field_name;

$body_message = 'From: '.$field_name."\n";
$body_message .= 'E-mail: '.$field_email."\n";
$body_message .= 'Message: '.$field_message;

$headers = 'From: '.$field_email."\r\n";
$headers .= 'Reply-To: '.$field_email."\r\n";

$mail_status = mail($mail_to, $subject, $body_message, $headers);

if ($mail_status) { ?>
  <script language="javascript" type="text/javascript">
		alert('Thank you for the message. I will contact you as soon as possible.');
		document.location = 'http://www.markblackler.com'
	</script>
<?php
}
else { ?>
	<script language="javascript" type="text/javascript">
		alert('Message failed. Please, send an email to mail@markblackler.com');
		document.location = 'http://www.markblackler.com'
	</script>
<?php
}
?>

gistfile1.html

<div id="fifth">
   <div class="scrollblock3">
    	<div class="contact-left">
        
<form action="contact.php" method="post">
	<font style="background-color: black;">Your name: </font><br>
    <input type="text" name="cf_name"><br>
	<font style="background-color: black;">Your e-mail: </font><br>
    <input type="text" name="cf_email"><br>
	<font style="background-color: black;">Message: </font><br>
    <textarea name="cf_message" rows="12" cols="60"></textarea><br><br>
	<input type="submit" value="Send"> 
	<input type="reset" value="Clear">
</form>
        </div>
	</div>