public <T> T prepareMessage(String subject, String sendTo, String htmlContent) throws MessagingException {
        Configuration config = getConfig();

        final String userName = config.getServiceMailAddress();
        final String password = config.getServiceMailPassword();
        final String personalName = config.getServiceMailPersonalName();

        final Properties mailProperties = config.getMailPropertiesValue();

        Session session = Session.getInstance(mailProperties, new javax.mail.Authenticator() {

            protected PasswordAuthentication getPasswordAuthentication() {
                return new PasswordAuthentication(userName, password);
            }
        });

        try {
            Message message = new MimeMessage(session);
            message.setFrom(new InternetAddress(userName, personalName));
            message.setRecipients(Message.RecipientType.BCC, InternetAddress.parse(sendTo));
            message.setSubject(subject);
            return (T) message;

        } catch (UnsupportedEncodingException e) {
            //rethrow exception
        }
    }

    @Override
    public synchronized void emailImages(String sendTo, String subject, String htmlContent, byte[][] images, ArrayList<String> imagesCid)
            {
        try {
            Message message = prepareMessage(subject, sendTo, htmlContent);

            Multipart multipart = new MimeMultipart("related");
            MimeBodyPart mailBody = new MimeBodyPart();
            mailBody.setContent(htmlContent, "text/html; charset=utf-8");

            mailBody.setHeader("Content-ID", "<file>");
            multipart.addBodyPart(mailBody);
            if (images != null && images.length > 0) {
                for (int i = 0; i < images.length; i++) {
                    String cid = imagesCid.get(i);

                    MimeBodyPart messageBodyPart = new MimeBodyPart();
                    messageBodyPart.setContent(images[i], "image/png");
                    messageBodyPart.setFileName(cid);
                    messageBodyPart.setHeader("Content-ID", "<" + cid + ">");
                    messageBodyPart.setHeader("X-Attachment-Id", cid);
                    messageBodyPart.setHeader("Content-Disposition", "inline; filename=" + cid + ".png");
                    multipart.addBodyPart(messageBodyPart);
                }
                message.setHeader("Content-Disposition", "inline; filename=file.html");
            }
            message.setContent(multipart);
            Transport.send(message);

        } catch (Throwable e) {
            //Rethrow exception
        }
    }

java.io.IOException: javax.mail.MessagingException: No MimeBodyPart content
    at com.sun.mail.smtp.SMTPTransport.sendMessage(SMTPTransport.java:1244)
    at javax.mail.Transport.send0(Transport.java:254)
    at javax.mail.Transport.send(Transport.java:124)
    at com.company.util.mail.SMTPSender.emailImages(SMTPSender.java:101)
    ... 8 more
Caused by: java.io.IOException: javax.mail.MessagingException: No MimeBodyPart content
    at com.sun.mail.handlers.multipart_mixed.writeTo(multipart_mixed.java:105)
    at javax.activation.ObjectDataContentHandler.writeTo(DataHandler.java:889)
    at javax.activation.DataHandler.writeTo(DataHandler.java:317)
    at javax.mail.internet.MimeBodyPart.writeTo(MimeBodyPart.java:1608)
    at javax.mail.internet.MimeMessage.writeTo(MimeMessage.java:1849)
    at com.sun.mail.smtp.SMTPTransport.sendMessage(SMTPTransport.java:1196)
    ... 11 more