public function addMergeVars($recipient, $data)
    {
        $vars = array();
        foreach ( $data as $name => $content ) {
            $vars[] = array('name' => $name, 'content' => $content);
        }

        $this->mergeVars[] = array(
            'rcpt' => $recipient,
            'vars' => $vars
        );

        return $this;
    }