Java: Getting Exception while sending attachment email

Question

I'm getting runtime exception UnsupportedDataTypeException while sending an email in java. Here is the exception in detail

Exception in thread "main" java.lang.RuntimeException: javax.mail.MessagingException: IOException while sending message;
  nested exception is:
    javax.activation.UnsupportedDataTypeException: no object DCH for MIME type multipart/mixed; 
    boundary="----=_Part_0_764977973.1480687764115"

How can I tackle this exception?

I'm using this piece of code: complete code

public static void main(String[] args) {

    String senderMail = "inzi769@gmail.com";
    String recepMail = "inzi.programmer@gmail.com";
    String pass = "*********";
    String host = "smtp.gmail.com";
    String filePath = "C:\\Users\\Inzimam\\Desktop\\helicopter_final.png";

    sendJavaMail(senderMail, pass, recepMail, host, filePath);
}

private static void sendJavaMail(String senderMail, String pass, String recepMail, String host, String filePath) {
    Properties props = new Properties();
    props.put("mail.smtp.auth", "true");
    props.put("mail.smtp.starttls.enable", "true");
    props.put("mail.smtp.host", host);
    props.put("mail.smtp.port", "25");
    // Get the Session object.
    Session session = Session.getInstance(props,
            new javax.mail.Authenticator() {
                @Override
                protected PasswordAuthentication getPasswordAuthentication() {
                    return new PasswordAuthentication(senderMail, pass);
                }
            });
    session.setDebug(true);
    try {

        Message message = new MimeMessage(session);            
        message.setFrom(new InternetAddress(senderMail));            
        message.setRecipients(Message.RecipientType.TO, InternetAddress.parse(recepMail));            
        message.setSubject("Subject here");            
        BodyPart messageBodyPart = new MimeBodyPart();            
        messageBodyPart.setText("This is message body");            
        Multipart multipart = new MimeMultipart();            
        multipart.addBodyPart(messageBodyPart);            
        messageBodyPart = new MimeBodyPart();


        DataSource source = new FileDataSource(filePath);
        messageBodyPart.setDataHandler(new DataHandler(source));
        multipart.addBodyPart(messageBodyPart);            
        message.setContent(multipart); 
        SMTPTransport t = (SMTPTransport) session.getTransport("smtps");
        t.connect("smtp.gmail.com", senderMail, pass);
        t.sendMessage(message, message.getAllRecipients());
        t.close();
//           Transport.send(message);

        JOptionPane.showMessageDialog(null, "Message has been sent  successfully!.");

    } catch (MessagingException e) {
        throw new RuntimeException(e);
    }
}

Please point out that where I'm wrong. Thanks

Answer 1

First I was using Javamail API 1.4.6 But Now with the Javamail API Version 1.5.0 or higher the same code above is working correctly. So, now with API 1.5.0 I'm able to send attachment successfully.

Edit: with API 1.4.6 when I used

Transport.send(message);

it did not work But with API 1.5.0 or higher we can also use

Transport.send(message);

instead of

SMTPTransport t = (SMTPTransport) session.getTransport("smtps");
            t.connect("smtp.gmail.com", senderMail, pass);
            t.sendMessage(message, message.getAllRecipients());
            t.close();