// Get attributes & flags for all messages
    Message[] messages = folder.getMessages();
    FetchProfile fp = new FetchProfile();
    //fp.add(FetchProfile.Item.ENVELOPE);
    fp.add(FetchProfile.Item.FLAGS);
    //fp.add("X-Mailer");
    folder.fetch(messages, fp);
                
                             

    // Process each message
    for (int i = 0; i < messages.length && i < 1500; i++)
    {
        if (!messages[i].isSet(Flags.Flag.SEEN))
        {
            //do something
        }
        messages[i].setFlag(Flags.Flag.SEEN, true);
    }
                                        
    folder.close(true);
    popConn.store.close();