3 ms·
They started caching images, but since open tracking pixel URLs are unique (after all, that's how they track an individual recipient) and Google only caches the
by petercooper 12y ago
They started caching images, but since open tracking pixel URLs are unique (after all, that's how they track an individual recipient) and Google only caches the image if you open the mail, essentially you still get tracking. You just don't get to count how many times the email is opened or the length it's opened (a common trick is to leave the connection open to see how long the client keeps the request open).
- judk 12y agoDo you evidence for your claim that google only caches the image if you open the mail? That seems to defeat the entire purpose of the feature.
- petercooper 12y agoYes, that I don't have 100% Gmail open rates reported in Mailchimp. Indeed, open rates barely changed at all (they went up just slightly since I guess everyone now has images enabled by default).