Send java email without authentication/with out sender password

I'm trying to send java email without senders password. Below you can see the code. I change mail.smtp.auth from true to false. There is a override method which method name getPasswordAuthentication():

public class SendMailUtilNineThirty implements Runnable {

    final private String SMTP_SERVER = "192.186.16.14";
    final private String SMTP_PORT = "135";
    final private String TO_EMAIL = "saman@thal.com";
    final private String TO_EMAIL = "dumidu@thal.com";
    final private String FROM_EMAIL = "samanchandana@thal.com";
    final private String FROM_EMAIL_PASSWORD = "1qaz2wsx@";

public void sendEmail(String emailContent, String subject) {
        try {
            Properties props = new Properties();
            props.put("mail.transport.protocol", "smtp");
            props.put("mail.smtp.host", SMTP_SERVER);
            props.put("mail.smtp.port", SMTP_PORT);
            props.put("mail.smtp.auth", "false");
            Session mailSession = Session.getInstance(props, new Authenticator() {
                @Override
                public PasswordAuthentication getPasswordAuthentication() {
                    return new PasswordAuthentication(FROM_EMAIL, FROM_EMAIL_PASSWORD);
                }
            });

            mailSession.setDebug(true);
            MimeMessage message = new MimeMessage(mailSession);
            message.setFrom(new InternetAddress(FROM_EMAIL));
            message.addHeader("site", "thal.com");
            message.addHeader("service", "Thal Service");
            message.setSentDate(new Date());
            message.addRecipients(Message.RecipientType.TO, InternetAddress.parse(TO_EMAIL));
            message.setSubject(subject);

How to send email without password authentication? Thanks.