It's pretty clear what "viewability" means, and why people like you want it. It's also unclear to me that you should be allowed to have it. The reason most ma

It's pretty clear what "viewability" means, and why people like you want it. It's also unclear to me that you should be allowed to have it. The reason most mail clients don't load remote content by default is to prevent spammers/marketers from getting "viewability" information. It's sort of a bummer that Google is apparently trying to push it into the HTML spec.