Email et html

function send_news($email_to,$sujet,$texte,$id1) {
$from = "TEST<contact@test.com>";
$id2 = base64_encode($email_to);
$texte = $texte."\n\n<p style='font-size: 9px; COLOR: #999999'
align='center'>Vous souhaitez vous désabonner de la newsletter ? Cliquez
<a
href='http://www.test.com/supp_newsletter.php?id1=".$id1."&id2=".$id2."'>ici</a></p>";
$limite = "_----------=_parties_".md5(uniqid (rand()));
$headers  = "Reply-to: ".$from."\n";
$headers .= "From: ".$from."\n";
$headers .= "X-Sender: <".$site.">\n";
$headers .= "X-Mailer: PHP\n";
$headers .= "X-auth-smtp-user: ".$from." \n";
$headers .= "X-abuse-contact: ".$from." \n";
$headers .= "Date: ".date("D, j M Y G:i:s O")."\n";
$headers .= "Reply-To: contact@test.com\r\n";
$headers .= "Content-Type: multipart/alternative;
boundary=\"".$limite."\"";
$message = "\n\n--".$limite."\n";
$message .= "Content-Type: text/html; ";
$message .= "charset=\"iso-8859-1\"; ";
$message .= "Content-Transfer-Encoding: 8bit;\n\n";
$message .= $texte;
mail($email_to, stripslashes($sujet), stripslashes($message), $headers);
}