Send mail in javax.mail without authentication

Question

I am using javax.mail to send mails in Java. Now that a part of the concept of my project changed I have to send a mail without authentication. I will have to change my createSession() method:

private void createSession() {
    properties.put("mail.smtp.auth", "true");
    properties.put("mail.smtp.starttls.enable", "true");
    properties.put("mail.smtp.host", server);
    properties.put("mail.smtp.port", port);

    session = Session.getInstance(properties, new javax.mail.Authenticator() {
        protected PasswordAuthentication getPasswordAuthentication() {
            return new PasswordAuthentication(username, password);
        }
    });
}

It is rather obvious that I should change mail.smtp.auth to false, but what else should I change?

Answer 1

private void createSession() {
    properties.put("mail.smtp.auth", "false");
     //Put below to false, if no https is needed
    properties.put("mail.smtp.starttls.enable", "true");
    properties.put("mail.smtp.host", server);
    properties.put("mail.smtp.port", port);

    session = Session.getInstance(properties);
}

I think, this would suffice.