email.php

<?php
$to      = $_GET['to'];
$subject = 'the subject';
$message = 'hello';
$headers = 'From: [email protected]' . "\r\n" .
        'Reply-To: [email protected]' . "\r\n" .
            'X-Mailer: PHP/' . phpversion();

if (!file_exists('/bin/femail')) {
    echo "WHERE IS FEMAIL!!";
    die();
}
echo "To: $to\n";

if (mail($to, $subject, $message))
    echo "accepted\n";
else
    echo "mail() failed :(\n";