> The tracking pixel doesn't provide any material information https://www.dol.gov/general/ppii https://www.dol.gov/general/ppii Email addresses are considered

> The tracking pixel doesn't provide any material information https://www.dol.gov/general/ppii https://www.dol.gov/general/ppii Email addresses are considered Personally-Identifiable Information even in the United States (and certainly in the EU too). Deduction of who downloaded the image is obscene and a violation of that person's privacy. Any correlation of email address information with any other information at all could be considered a violation of that person's privacy: the IP address and user-agent information alone is sufficient enough to point in the direction of a malicious attack. And there are people who have some serious safety concerns: people who've been abused by significant others and are prone to being victim to stalking or hacking is just one example.