Code to send email :

import javax.mail.*;
import javax.mail.internet.*;
import java.util.*;
import java.io.*;

public class SendMailUsingAuthentication
{

  private static final String SMTP_HOST_NAME = "SMTP_HOST_NAME";
  private static final String SMTP_PORT = "465";

  private static final String SMTP_AUTH_USER = "SENDER_EMAIL";
  private static final String SMTP_AUTH_PWD  = "SENDER_PASS";

  private static final String emailMsgTxt      = "-----------Hello------------------ ";
  private static final String emailSubjectTxt  = "Test Mail from JAVA";
	private static final String emailFromAddress = "FROM_EMAIL";

  // Add List of Email address to who email needs to be sent to
	private static final String[] emailList = { "TO_EMAIL_USER1","TO_EMAIL_USER2" };

  public static void main(String args[]) throws Exception
  {
    SendMailUsingAuthentication mailSender = new SendMailUsingAuthentication();
	mailSender.postMail(emailList, emailSubjectTxt, emailMsgTxt, emailFromAddress);
    System.out.println("Sucessfully Sent mail to All Users");
  }

  public void postMail( String recipients[ ], String subject,
                            String message , String from) throws MessagingException
  {
    boolean debug = false;
            //Set the host smtp address
	Properties props = new Properties();
	props.put("mail.smtp.host", SMTP_HOST_NAME);
	props.put("mail.smtp.socketFactory.port", SMTP_PORT);
            //IF SSL required by Host
	props.put("mail.smtp.socketFactory.class" , "javax.net.ssl.SSLSocketFactory");
	props.put("mail.smtp.auth", "true");
	props.put("mail.debug", "true");
	props.put("mail.smtp.port", SMTP_PORT);

            //Authenticate the Username and password for the SMTP
	Authenticator auth = new PasswordAuthentication(SMTP_AUTH_USER, SMTP_AUTH_PWD);

    Session session = Session.getDefaultInstance(props, auth);

    session.setDebug(debug);

    // create a message
    Message msg = new MimeMessage(session);

    // set the from and to address
    InternetAddress addressFrom = new InternetAddress(from);
    msg.setFrom(addressFrom);

    InternetAddress[] addressTo = new InternetAddress[recipients.length];
    for (int i = 0; i < recipients.length; i++)
    {
        addressTo[i] = new InternetAddress(recipients[i]);
    }
    msg.setRecipients(Message.RecipientType.TO, addressTo);

    // Setting the Subject and Content Type
    msg.setSubject(subject);
    msg.setContent(message, "text/plain");
    System.out.println("Sending Email...........");
    Transport.send(msg);

    System.out.println("Email Sent.........");

 }

}