MAIL API : MessageCountListener not working

Question

Dear friends
I'm having a problem with mail API. I added a messagecountlistener to my INBOX folder. But it is not responding to new mails. I tried using the monitor example that comes along with the samples in mail API but that too is not working.. Following is the code of monitor.java sample
public static void main(String argv[])
     if (argv.length != 5) {
     System.out.println("Usage: monitor <host> <user> <password> <mbox> <freq>");
     System.exit(1);
     System.out.println("\nTesting monitor\n");
try {
     Properties props = System.getProperties();
     // Get a Session object
     Session session = Session.getDefaultInstance(props, null);
     // session.setDebug(true);
     // Get a Store object
     Store store = session.getStore("imap");
     // Connect
     store.connect(argv[0], argv[1], argv[2]);
     // Open a Folder
     Folder folder = store.getFolder(argv[3]);
     if (folder == null || !folder.exists()) {
          System.out.println("Invalid folder");
          System.exit(1);
     folder.open(Folder.READ_WRITE);
     // Add messageCountListener to listen for new messages
     folder.addMessageCountListener(new MessageCountAdapter() {
          public void messagesAdded(MessageCountEvent ev) {
          Message[] msgs = ev.getMessages();
          System.out.println("Got " + msgs.length + " new messages");
          // Just dump out the new messages
          for (int i = 0; i < msgs.length; i++) {
               try {
               DataHandler dh = msgs.getDataHandler();
               InputStream is = dh.getInputStream();
               int c;
               while ((c = is.read()) != -1)
                    System.out.write(c);
               } catch (IOException ioex) {
               ioex.printStackTrace();     
               } catch (MessagingException mex) {
               mex.printStackTrace();
     // Check mail once in "freq" MILLIseconds
     int freq = Integer.parseInt(argv[4]);
     for (; ;) {
          Thread.sleep(freq); // sleep for freq milliseconds
          // This is to force the IMAP server to send us
          // EXISTS notifications.
          int i = folder.getMessageCount();
System.out.println(i);
     } catch (Exception ex) {
     ex.printStackTrace();
Problem is that inspite of new mails coming in , the count is not incrementing and no listener is getting activated.. Please give me a solution for this
Regards
DST
Can anyone tell me why

Answer 1

Hello!
I've the same problem, using protocol pop3 insteadof imap.
I use jdk1.4 and the last release of mail.jar and activation.jar.
Please help !
Thanx.
Fabien.