[PHP] yahoo route my mail's to bulk folder

[Ali Ashrafzadeh]

hi and thank's my friend's
in a web application I send mail message to members using mail() function in HTML 
format but yahoo mail server route my messages to bulk folder , I want know if  there 
is any setting requiered in my script to send mail correctly, PHPINFO() function 
return 
sendmail_from = [EMAIL PROTECTED]
sendmail_path = /usr/sbin/sendmail -t -i 
Path to sendmail = /usr/sbin/sendmail -t -i
I  send my mail useing function below:
please tell me if you know better method to send mime mail 
function send_mail($to,$subject,$message){

  $headers  = "MIME-Version: 1.0\r\n";
  $headers .= "Content-type: text/html; charset=windows-1256\r\n";

  $headers .= "From: Me <[EMAIL PROTECTED]>\r\n";
  $headers .= "Return-path: Me <[EMAIL PROTECTED]>\r\n";
  $headers .= "Reply-To: Me <[EMAIL PROTECTED]>\r\n";
//  $headers .= "Bcc: $to \r\n";

  if (mail($to, $subject, $message, $headers))
    print("$to Send Ok!<br>");
  else
    print("<b>$to Send Problem</b>!<br>");
}
best regards