Ever since OS X Mavericks was released, some customers using the built-in Mail.app application have repeatedly had issues retrieving new mail messages, deleting or moving messages, and more. Some of the problems were fixed in an update released back in November, and then in OS X 10.9.1, but for some, the issues retrieving new messages persist. Some users found that quitting and restarting Mail forced the application to download new messages, but Apple has now published an awkward workaround that allows the app to stay open while still forcing a download of new messages.
