The cache with polish

Hi everyone, My question is: if i enable Polish, will this cache alle the images or can i set some images that will not be cached.
For the wordpress users: i use photon now, and it cahces all the images etc, even images wich are not hosted on my server.
i ask this because some pictures from external links are also been saved by photon and these images are .png wich will regenarate themselves. the same name but a different image.
For example:
On my end its like:

As you can see it has the in front.

So i hope you can help me.



We wouldn’t cache content coming from as it’s not your domain. We don’t cache any content coming from 3rd party sources/ external links.