Folder folder = store.getFolder("INBOX");
						
folder.open(Folder.READ_ONLY);

Message[] messages = folder.getMessages();

folder.setFlags(messages,  new  Flags(DELETED), true);

folder.close(true);

 class  MyStore{

 private  Properties properties;

	 private  String protocol;

	 private  String host;

	 private  String login;

	 private  String password;

	 private  Session session;

	 private  Store store;

 public   void  init()  throws  MessagingException {
		 try  {
			session = Session.getDefaultInstance(properties,  null );
			store = session.getStore(protocol);
			store.connect(host, login, password);
		}  catch  (Exception e) {
			logger.error(e);

		}
}