try {
            final Object content = message.getContent();
            if (content instanceof final Multipart multipart) {
                final int count = multipart.getCount();
                for (int i = 0; i < count; i++) {
                    final BodyPart bodyPart = multipart.getBodyPart(i);
                    if (Part.ATTACHMENT.equalsIgnoreCase(bodyPart.getDisposition())) {

				"model/vrml",
				"multipart/alternative",
				"multipart/appledouble",
				"multipart/byteranges",
				"multipart/digest",
				"multipart/encrypted",
				"multipart/example",
				"multipart/form-data",
				"multipart/header-set",
				"multipart/mixed",
				"multipart/parallel",
				"multipart/related",
				"multipart/report",
				"multipart/signed",
				"multipart/voice-message",

                    return;
                }
                try {
                    List<FileItem> multiparts = new ServletFileUpload(new DiskFileItemFactory()).parseRequest(request);
                    for (FileItem item : multiparts) {
                        if (!item.isFormField()) {
                            // item is not form field.
                        } else {

  <mime-type type="multipart/header-set"/>
  <mime-type type="multipart/mixed"/>
  <mime-type type="multipart/parallel"/>
  <mime-type type="multipart/report"/>
  <mime-type type="multipart/signed"/>
  <mime-type type="multipart/voice-message"/>

  <mime-type type="application/dif+xml">
    <root-XML localName="DIF"/>

        httpClientContext.setCredentialsProvider(credentialsProvider);

        // Request Header
        final RequestHeader[] requestHeaders = { new RequestHeader("enctype", "multipart/form-data") };
        for (final RequestHeader requestHeader : requestHeaders) {
            if (requestHeader.isValid()) {