Well, you have the option to turn it off. They could also be serving the images cached which wouldn't indicate anything to the sender, and they are just adding this caveat to be extra cautions. Not to mention that…
It will if the images are cached.
Gmail seems to be proxying the images through: https://ci5.googleusercontent.com/proxy/ and my understating the polling happens when Google receives the email not when it's opened.
Well, you have the option to turn it off. They could also be serving the images cached which wouldn't indicate anything to the sender, and they are just adding this caveat to be extra cautions. Not to mention that…
It will if the images are cached.
Gmail seems to be proxying the images through: https://ci5.googleusercontent.com/proxy/ and my understating the polling happens when Google receives the email not when it's opened.