public function getSendQuota() {
        $response = $this->_makeRequest(array(
            'Action' => 'GetSendQuota'
        ));
        $dom = new DOMDocument();
        $dom->loadXML($response);
        $out = array(
            'Max24HourSend'     => $dom->getElementsByTagName('Max24HourSend')->item(0)->nodeValue,
            'MaxSendRate'       => $dom->getElementsByTagName('MaxSendRate')->item(0)->nodeValue,
            'SentLast24Hours'   => $dom->getElementsByTagName('SentLast24Hours')->item(0)->nodeValue
        );
        return $out;
    }