I assume the issue here is that "Merry Christmas YourName" is more likely to be perceived as a personal note whereas "Happy Holidays YourName" (or the more verb

I assume the issue here is that "Merry Christmas YourName" is more likely to be perceived as a personal note whereas "Happy Holidays YourName" (or the more verbose version) sounds like a corporate greeting -- and one the reader therefore filters past. Can someone explain to me how "open" rates are tracked? In all my mail clients I prevent remote images from loading automatically. I assume many people do the same. Is this tracking of open rates skewed as a result? Or maybe it just doesn't matter as long as you're just using it for comparison purposes?