I am having the same skewed results a year later - 97% desktop vs. 3% mobile. The answer doesn't appear to address the question, other than the coincidence in timing. If consumers use the Apple Mail app on their phones, the same preloading of images and skewed open information would come from the phones too, regardless of ESP. Are we to assume almost no one uses the Apple Mail app on their phone and instead use the branded app for another mail service (i.e., Gmail) almost exclusively? Or that my user base has very few iPhone owners? This is unlikely in New York City where iPhones are extremely popular. Any new ideas? ... View more