private String userpass;
    private String from;

    //attachments not required
    private boolean sendMail(String to, String user, String pass, String subject, String p_message){
        from = user;
        userpass = pass;

        String host = "localhost";
        Properties props = new Properties();
        props.setProperty("mail.smtp.ssl.enable", "true");
        props.put("mail.smtp.starttls.enable", "true");
        props.put("mail.smtp.auth", "true");
        props.put("mail.smtp.host", "smtp.gmail.com");
        props.put("mail.smtp.port", "587");


        props.put("mail.imap.ssl.enable", "true"); // required for Gmail
        props.put("mail.imap.sasl.enable", "true");
        props.put("mail.imap.sasl.mechanisms", "XOAUTH2");
        props.put("mail.imap.auth.login.disable", "true");
        props.put("mail.imap.auth.plain.disable", "true");

        Session session = Session.getInstance(props,
          new javax.mail.Authenticator() {
            protected PasswordAuthentication getPasswordAuthentication() {
                return new PasswordAuthentication(from, userpass);
            }
          });
        try{
            Store store = session.getStore("imap");
            store.connect("imap.gmail.com", from, userpass);
        }
        catch (Exception e){
            e.printStackTrace();
        }
        try {

            Message message = new MimeMessage(session);
            message.setFrom(new InternetAddress(from));
            message.setRecipients(Message.RecipientType.TO,
                InternetAddress.parse(to));
            message.setSubject(subject);
            message.setText(p_message);

            Transport.send(message);

            System.out.println("Sent to "+to);
            return true;
        }
        catch (javax.mail.AuthenticationFailedException auth_e){
            auth_e.printStackTrace();
            System.out.println("Invalid username or password");
            return false;
        }
        catch (MessagingException e) {
            e.printStackTrace();
            return false;
        }
    }