• hedgehog@ttrpg.network
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      1 month ago

      If it’s prefetched, it doesn’t matter that you reveal that it’s been “opened,” as that doesn’t reveal anything about the recipient’s behavior, other than that the email was processed by the email server.

      • fmstrat@lemmy.nowsci.com
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        1 month ago

        If by prefetch you mean the server grabs the images ahead of time vs the client, this does not happen, at least on amy major modern platform that I know of. They will cache once a client has opened, but unique URLs per recipient are how they track the open rates.

      • fmstrat@lemmy.nowsci.com
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        1 month ago

        But the path changes with every new data element. It’s never the same, so every “prefetch” is a whole new image in the system’s eyes.

        • hedgehog@ttrpg.network
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          1 month ago

          Even with a unique link, if the behavior is that as soon as the email server receives it, it’s prefetched, what does that reveal about the user?

            • hedgehog@ttrpg.network
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              1 month ago

              Cool, all of your images are getting fetched by the server as it receives and processes the emails. You have 100% open rate on all emails to that domain within 3 minutes of send.

              What do you know about the user and their behavior? Nothing. The prefetch is not tied to their actions, therefore you cannot learn anything about their actions.

              • fmstrat@lemmy.nowsci.com
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                1 month ago

                This post isn’t about email open rates, it’s about data exfiltration. But for email speficially, show me major providers that prefetch by default.