4 ms·

They'll probably retrieve and cache every image as soon as the email is received which would effectively render open statistics meaningless for GMail addresses.

• mratzloff 13y ago
  They don't, and it doesn't. See the post by @danielnr.
  • mtrimpe 13y ago
    They don't yet. I wouldn't be surprised if they do the same as with 'not provided' where they slowly make the data less reliable until they finally just turn it off altogether.