JavaMail doesnt retrieve mail from sender other than Google

I'm using javamail libs to develop simple apps to sending encrypted mail via gmail. after travelling and googling everywhere, it is finnaly done. At least until i run it again this night, suddenly it doesnt read any email other from google.

My code is like this

public static void check(String host, String storeType, String user,
            String password) {
        try {

            //create properties field
            Properties properties = new Properties();

            properties.put("mail.pop3.host", host);
            properties.put("mail.pop3.port", "995");
            properties.put("mail.pop3.starttls.enable", "true");
            Session emailSession = Session.getDefaultInstance(properties);

            //create the POP3 store object and connect with the pop server
            Store store = emailSession.getStore("pop3s");

            store.connect(host, user, password);

            //create the folder object and open it
            Folder emailFolder = store.getFolder("INBOX");
            emailFolder.open(Folder.READ_ONLY);

            // retrieve the messages from the folder in an array and print it
            Message[] messages = emailFolder.getMessages();
            System.out.println("messages.length---" + messages.length);

            for (int i = 0, n = messages.length; i < n; i++) {
                Message message = messages[i];
                System.out.println("---------------------------------");
                System.out.println("Email Number " + (i + 1));
                System.out.println("Subject: " + AESencrp.decrypt(message.getSubject()));
                System.out.println("From: " + message.getFrom()[0]);
                System.out.println("Text: " + AESencrp.decrypt(message.getContent().toString()));

            }

            //close the store and folder objects
            emailFolder.close(false);
            store.close();

        } catch (NoSuchProviderException e) {
            e.printStackTrace();
        } catch (MessagingException e) {
            e.printStackTrace();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

It simply show email from google, however there is another 3 email from other address. I didn't understand, last time I run that code, it works flawlessly. Note that im not making any change to the code from last time run success.

Solution

These JavaMail FAQ entries might help: