String[] cLength = part.getMimeHeader(MimeConstants.CONTENT_LENGTH);
if (cLength != null && !cLength[0].equals(""))
part.setMimeHeader(MimeConstants.CONTENT_LENGTH, Integer.toString(cipherOutput.length));
part.clearContent();
part.setDataHandler(new javax.activation.DataHandler(new _DS(cipherOutput, mimeType)));
} else {
MimeBodyPart decryptedAttachment = new MimeBodyPart(is);
// validate cid