function check_mail($email, $simple = false)
{
    global $config;
    if (preg_match("~^" . EMAIL_REGEXP . "\$~i", $email)) {
        list(, $domain) = explode('@', $email);
        $domain = strtolower($domain);
        // Check MX record.
        // The idea for this is from UseBB/phpBB
        if ($config['local_mode'] == 0 && $config['email_check_mx'] == 1 && !$simple) {
            if (checkmx_idna($domain) === false) {
                return false;
            }
        }
        if ($config['sessionmails'] == 1 && !$simple) {
            // get the known domains in lower case
            $sessionmails = file('data/sessionmails.php');
            $sessionmails = array_map("trim", $sessionmails);
            $sessionmails = array_map("strtolower", $sessionmails);
            // compare the data and return the result
            if (in_array($domain, $sessionmails)) {
                return false;
            }
        }
        return true;
    } else {
        return false;
    }
}
function check_mail($email, $simple = false)
{
    global $config;
    if (preg_match("/^([_a-zA-Zהצ�0-9-]+(\\.[_a-zA-Z0-9הצu-]+)*@[a-zA-Zהצu0-9-]+(\\.[a-zA-Z0-9הצ�-]+)*(\\.[a-zA-Z]{2,}))/si", $email)) {
        list(, $domain) = explode('@', $email);
        $domain = strtolower($domain);
        // Check MX record.
        // The idea for this is from UseBB/phpBB
        if ($config['email_check_mx'] && !$simple) {
            if (checkmx_idna($domain) === false) {
                return false;
            }
        }
        if ($config['sessionmails'] == 1 && !$simple) {
            // get the known domains in lower case
            $sessionmails = file('data/sessionmails.php');
            $sessionmails = array_map("trim", $sessionmails);
            $sessionmails = array_map("strtolower", $sessionmails);
            // compare the data and return the result
            if (in_array($domain, $sessionmails)) {
                return false;
            }
        }
        return true;
    } else {
        return false;
    }
}