PHP Send Mail using mail function in PHP

$to = "test.net@gmail.com";

$subject = "test.net";

$body = "Body of your message here you can use HTML too. e.g. <br> <b> Bold </b>";

$headers = "From: Peter\r\n";

$headers .= "Reply-To: info@yoursite.com\r\n";

$headers .= "Return-Path: info@yoursite.com\r\n";

$headers .= "X-Mailer: PHP5\n";

$headers .= 'MIME-Version: 1.0' . "\n";

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

mail($to,$subject,$body,$headers);

?>