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A comment on Gmail is opening and caching URLs within emails without user intervention (2019). Parent comment

Re:Gmail is opening and caching URLs within emails without u... by eu on Friday August 20, 2021 @10:42AM (#28246602)
We've seen something similar with one of the email campaign services. The Unsubscribe links were "clicked" within a minute of emails being sent. Other services show you a message and process the unsubscribe on a POST request.
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