I thought it would be worthwhile to conduct a quick poll to try to get a feel for the accuracy of our open rates.
As you may know, open-rate tracking works by inserting an HTML image tag into an HTML email. It calls a remote script that does the counting.
But the big problem is this. If a subscriber's email software is set not to display images or their computer is offline then that 'open' won't be counted.
...is your email software set to automatically display images or not?