Java APIs

Here i want to make a imap secure connection but i am facing a problem. Java mail Api allows to create a connection with wrong userid or password. Here is my code

Properties prop = new Properties();

String protocol="imap";

String host="imap.gmail.com";

int port=993;

String userName="";

String password="";

prop.put("mail.host",host);

prop.put("mail.imap.socketFactory.class", SSL_FACTORY);

prop.put("mail.imap.socketFactory.fallback", "false");

prop.put("mail.imap.sasl.enable","true");

prop.put("mail.imap.auth.login.disable","true");

prop.put("mail.imap.timeout","10000");

Session session = Session.getInstance(prop);

Store _store = session.getStore(protocol);

try {

    _store.connect(host,port, userName, password);

    }catch (MessagingException e) {

}

Here _store.conect allows to make connection with wrong user id and password and do not throw any authentication related exception. Please help me to resolve this problem.