Untitled

<?php
$activationcode=md5($_REQUEST["email"]);
$to   = $_REQUEST['email'];
$msg = "
<html>
<head>
</head>
<body>
<h1>HEADING</h1>
<p>We are happy to have you as a member<br> Thanks again for registering We value your privacy and use a variety of security measures to protect your
personal information click.</p>
<p>
<a href=www.google.com>GOOGLE</a>//it works
<a href=www.mywebsite.com>ABC</a>//it doesnt work
</p>
</body>
</html>
";

 $senderemail="abc@gmail.com";
   $headers = "MIME-Version: 1.0" . "rn";
  $headers .= "Content-type:text/html;charset=ISO-8859-1" . "rn";
  $headers .= 'From: ' .$senderemail . "rn".
  'Reply-To: ' . $senderemail. "rn" .
  'X-Mailer: PHP/' . phpversion();
  mail($to,"SUBJECT",$msg,$headers);

?>