public function get_hostlist()
    {
        $default_hosts = (array) $this->getprop('default_host');
        $out           = array();

        foreach ($default_hosts as $key => $name) {
            if (!empty($name)) {
                $out[] = rcube_utils::parse_host(is_numeric($key) ? $name : $key);
            }
        }

        return $out;
    }