Very nice, but is it customizable? Could I set it up myself to say that I'm busy now, and probably won't be able to reply soon, regardless of the amount of e-mail I have in my inbox? Or maybe could it somehow relate to the how many e-mails I have sent/read in the past few hours to understand if I've been going through them? Like "he has been to his inbox for x hours now, so please don't expect a quick answer right now..."