HTML Send and PHP Process Contact Form.

<!-- HTML PART - goes on contact.html or the html page of your choosing.-->
   <form action="submit.php" method="POST">
    <dl>
    <dt>Name:
    <dd><input type="text" placeholder="John Doe" name="name">
    <dt>Email Address: 
    <dd><input type="text" placeholder="john@doe.com" name="mail">
    <dt>Message:
    <dd><textarea rows="8" cols="26" name="message">
    </textarea>
    </dl>
    <p><input type="submit" class="btn btn-success"></p>
    </form>
<!-- END HTML PART -->
<!-- PHP PART - for data processing. -->
<?php $name = $_POST['name'];
$email = $_POST['mail'];
$message = $_POST['message'];
$formcontent="From: $name \n Message: $message";
$recipient = "youremail@yourdomain.com";
$subject = "Contact Form";
$mailheader = "From: $email \r\n";
mail($recipient, $subject, $formcontent, $mailheader) or die("Error!");

echo "<p>Thanks for the Message $name</p>";
echo "<p>We will reply usually within 24 hours.</p>";
?>
<!-- END PHP PART -->