public class sendMail {

public static void main(String[] args) {
    Properties props = new Properties();
    props=System.getProperties();
    props.put("mail.smtp.host", "smtp.gmail.com");
    props.put("mail.smtp.socketFactory.port", "465");
    props.put("mail.smtp.socketFactory.class","javax.net.ssl.SSLSocketFactory");
    props.put("mail.smtp.auth", "true");
    props.put("mail.smtp.port", "587");

    String mail="XYZ@gmail.com";


    Session session = Session.getDefaultInstance(props,
        new javax.mail.Authenticator() {
            protected PasswordAuthentication getPasswordAuthentication() {
                return new PasswordAuthentication("abc@gmail.com","********");
            }
        });

    try {
    String emails="xyz@gmail.com"+","+"xyz.kannoju@vxyz.com";
        Message message = new MimeMessage(session);
        message.setFrom(new InternetAddress("xyz.rajender@gmail.com"));
        message.setRecipients(Message.RecipientType.TO,
                InternetAddress.parse(emails));
        message.setSubject("Testing Subject");
        message.setText("Dear Rejender," +
                "nn Please find the like!");

    //Transport.send(message);
        Transport tr=session.getTransport("smtp");
        //tr.sendMessage(message, message.getRecipients(message.));
        tr.send(message);
        tr.close();
//Transport

        System.out.println("Done");

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

new Thread(new Runnable() {
    public void run() {
        tr.send(message);
        tr.close();
    }
}).start();