public static void main(String[] args) {
  // Recipient's email ID needs to be mentioned.
  String to = "destinationemail@gmail.com";

  // Sender's email ID needs to be mentioned
  String from = "fromemail@gmail.com";
  final String username = "manishaspatil";//change accordingly
  final String password = "******";//change accordingly

  // Assuming you are sending email through relay.jangosmtp.net
  String host = "relay.jangosmtp.net";

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