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andrewem
on Jan 25, 2014
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Gmail was down
Now they're caching each image once for all users, which pretty much defeats that.
schrodinger
on Jan 25, 2014
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Not really, now you just have to have a unique image URL for each email you send. How could they possibly tell they are the same image before downloading them?
nfoz
on Jan 27, 2014
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Exactly; their behaviour is still extremely friendly to the spammers/trackers.
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