$subject = 'TITLE';
$subject = "=?utf-8?b?". base64_encode($subject) ."?=";
$message = 'MESSAGE';
$headers = 'Content-type: text/plain; charset="utf-8"';
$headers .= "MIME-Version: 1.0\r\n";
$headers .= "Date: ". date('D, d M Y h:i:s O') ."\r\n";
mail($to, $subject, $message, $headers);