That happens if email is opened via clients like Thunderbird. For gmail, image w... | Hacker News

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		pirsquare on Sept 29, 2020 \| parent \| context \| favorite \| on: The life and death of email read tracking That happens if email is opened via clients like Thunderbird. For gmail, image will be served via google proxy servers.

pixl97 on Sept 29, 2020 | [–]

What is the cache time for said proxy servers? Does it follow content expiration rules?

sroussey on Sept 29, 2020 | [–]

In my tests using Gmail website, I see the read receipts right away.

bigiain on Sept 30, 2020 | [–]

Do you see them the second or third time you open the mail?

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