The headline is fierce, the graphics eye catching and the copy just might rival Hemingway's distinctive clarity of style. The list has been finely honed and the campaign timed to coincide with that amazing event <fill in the blank.> But, WAH-WAH, cue the crickets. Bueller? Bueller? There are few things more frustrating as a marketer than launching an email campaign that just falls flat. And not just a little flat, but a BIG flat – as in utter disaster. Average open rates c