public function parse($value)
    {
        if (!strlen($value)) {
            return;
        }

        $this->_data = $value;
        $this->_datalen = strlen($value);
        $this->_params['validate'] = true;
        $this->_ptr = 0;

        $this->_rfc822SkipLwsp();

        while ($this->_curr() !== false) {
            try {
                $this->ids[] = $this->_parseMessageId();
            } catch (Horde_Mail_Exception $e) {
                break;
            }

            // Some mailers incorrectly insert commas between reference items
            if ($this->_curr() == ',') {
                $this->_rfc822SkipLwsp(true);
            }
        }
    }