How to receive a formail in HTML format?

[yesmaybe]

I have the following form mail code (slightly amended for safety).

I added the lines (from http://php.net/manual/en/function.mail.php) to make the form send by HTML, but it doesn't work.

[CODE]$headers  = 'MIME-Version: 1.0' . "\r\n";
$headers .= 'Content-type: text/html; charset=iso-8859-1' . "\r\n";[/CODE]

Can someone suggest what is wrong, or what needs to be done?

<?php
if(isset($_POST['Submitted'])) {

  $Errors = Array();
  if(!trim($_POST['name'])) $Errors[] = "What is your name?";
  if(!trim($_POST['comment'])) $Errors[] = "Please add some more comments";
  if(!preg_match("/[a-zA-Z0-9._-]+@[a-zA-Z0-9._-]+\.[a-zA-Z0-9]{2,4}/",$_POST['email'])) $Errors[] = "please check your email address";
  if(strtolower(trim($_POST['antispam'])) xxx";
  if(!count($Errors)) {
    $To .= 'To: Enquiries <xxx@xxx' ;	
	$Subject .= "Online Inquiry" . "\r\n";

$Indhold .= "Please reply to this online enquiry form as soon as possible:\r\n"; 
$Indhold .= "Subject: ".$_POST['subject']."\r\n"; 
$Indhold .= "Name: ".$_POST['name']."\r\n"; 
$Indhold .= "Phone: ".$_POST['phone']."\r\n"; 
$Indhold .= "Mobile: ".$_POST['mobile']."\r\n"; 
$Indhold .= "e-mail: ".$_POST['email']."\r\n"; 


$headers  = 'MIME-Version: 1.0' . "\r\n";
$headers .= 'Content-type: text/html; charset=iso-8859-1' . "\r\n";

$headers .= 'From: Enquiry <online@xxx' . "\r\n";
$headers .= "Reply-To:  ". $_POST['email'] ."  \r\n";	
$headers .= "Bcc: [e-mail]\r\n"; 

$MailSuccess = mail($To, $Subject,  $Indhold, $headers); 
header("Location: thanks.php");
exit;
  }
}

[yesmaybe]

Perhaps I should add ..

The form arrives ok, but it is in plain text. When my staff reply, I want an HTML footer to be added automatically. So I want the webform to arrive in HTML encoding, not plain text. We use Outlook 2003 in the office and when you reply to an email, it automatically includes an HTML footer. However, when you click reply, it composes the email how it was sent. As my formmail arrives as 'plain text' the signature automatically loses its formatting.

I have not had any luck changing Outlook 2003 settings so it automatically replies as HTML, so my next step is to have the initial enquiry contact form to arrive in HTML, so the first response can be sent to the customer as HTML. I hope that explains more my quest.

Thanks for any advice.
Andy