On: A Clever Way to Tell Which of Your Emails Are Being Tracked

[pyre]

> what time

Not necessarily. Does Google cache the image when receiving the email, or when you view it?

[mike-cardwell → pyre]

Google only fetches the image when you first view it. At least it did when I tested it when they first started doing it.

[talkingquickly → mike-cardwell]

That still seems to be the behaviour, so it still works for open tracking just not the additional meta data. Fantastic tool you've created by the way!

[ppadron → pyre]

I haven't tested it yet, but it seems you can setup your tracking image to return a "Cache-Control: no-cache, max-age=0" header and it will always be reloaded when the email is opened.

http://blog.movableink.com/real-time-content-and-re-open-tra...