Spam Rescue and Type I Errors

Consider this scenario: you get a phone call from a key client or a distraught family member: “didn’t you get my email?”  They are clearly upset that you “ignored” them: they see evidence that they are not your priority. You are not unresponsive.  You don’t care.  

Or maybe, your spam filter was doing just a bit too good a job.  Welcome to the world of Type I errors.