final String smtpAuthUserName = "*********";
    final String smtpAuthPassword = "*********";
    String emailFrom = "**********";
    String emailTo   = "*********888";
    Authenticator authenticator = new Authenticator()
    {
        @Override
        protected PasswordAuthentication getPasswordAuthentication()
        {
            return new PasswordAuthentication(smtpAuthUserName, smtpAuthPassword);
        }
    };
    Properties properties = new Properties();
    properties.setProperty("mail.smtp.host", "outlook.office365.com");
    properties.setProperty("mail.smtp.port", "587");
    properties.setProperty("mail.smtp.auth", "true");
    properties.setProperty("mail.smtp.starttls.enable", "true");
    Session session = Session.getInstance( properties, authenticator );
    try
    {
        Message message = new MimeMessage(session);
        message.setFrom(new InternetAddress(emailFrom));
        InternetAddress[] to = {new InternetAddress(emailTo)};
        message.setRecipients(Message.RecipientType.TO, to);
        message.setSubject("PLACE_SUBJECT_HERE");
        message.setText("YOUR_MESSAGE_HERE");
        Transport.send(message);
    }
    catch (MessagingException exception)
    {
        exception.printStackTrace();
    }