final Header header = headers.nextElement();
                data.putValue(header.getName(), header.getValue());
            }
            putValue(data, "Content-ID", message.getContentID());
            putValue(data, "Content-Language", message.getContentLanguage());
            putValue(data, "Content-MD5", message.getContentMD5());
            putValue(data, "Description", message.getDescription());