Javax mail Authentication Failed Exception

public class MailManager {
        Transport t;
        String pass = "senha";
        String fro = "[email removido]";
        String too = "[email removido]";
        String user = "[email removido]";

        public MailManager() {
        }

        public void send() throws Exception {
        try {
                SimpleAuth auth;
                auth = new SimpleAuth("[email removido]", "senha");
                Properties mailProps = new Properties();
                mailProps.put("mail.smtp.host", "smtp.server.com");
                mailProps.put("mail.smtp.auth", "true");
                mailProps.put("mail.user", user);
                mailProps.put("mail.pwd", pass);
                mailProps.put("mail.from", fro);
                mailProps.put("mail.to", too);
                Session mailSession = Session.getInstance(mailProps, auth);
                mailSession.setDebug(false);
                Message email = new MimeMessage(mailSession);
                email.setRecipients( Message.RecipientType.TO, InternetAddress.parse(too) );
                email.setFrom( new InternetAddress(fro));
                email.setSubject("Autenticado");
                email.setContent( "Texto", "text/plain" );
                Transport.send( email );
                }
                catch (Exception e) {
                        throw e;
                }
                System.out.println(" [#] Email successfully sent");
                return;
        }

        class SimpleAuth extends Authenticator {
        public String username = null;
        public String password = null;

        public SimpleAuth(String user, String pwd) {
            username = user;
            password = pwd;
        }

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

public class SendEmail{
        public static void main(String args[]) {
                MailManager m = new MailManager();
                try {
                        m.send();
                }
                catch (javax.mail.AuthenticationFailedException  e) {
                      e.printStackTrace(System.out);
                      System.out.println(e.getMessage());
                }
                catch (Exception e){}
        }
}