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They know when google loads the image, which is when you open the email.
by neolog 5y ago
They know when google loads the image, which is when you open the email.
- spicybright 5y agoThey only know when google fetches the image, which can be any time between you receiving it and opening it. I highly doubt it's on the fly right when you open it.
- snowwrestler 5y agoIt is in fact on the fly when you open it. All Gmail does is proxy the request to hide your IP from the server hosting the image file. Gmail does not change the timing of the request, the URL, or the image file.