Why Optimole is not able to download the images from my site?

Sometimes, for various reasons, Optimole is not able to download the images to optimize them. 

Usually, these issues can be caused by: 

1. You are using a non-public website ( localhost, intranet, etc.). Optimole requires access to your images to download them, and we need the image URLs to be accessible from our end.
2. You are running a password-protected site. We will need unrestricted access to your images in order to download them. If you would like to open this for Optimole service, we use this user-agent: Optimole(1.0), which you can add to your allowed list.
3. You are using a firewall that blocks Optimole from downloading the images. In order to fix this, you would need to allow this user agent to access the images: Optimole(1.0) unrestricted. 
4. The image is no longer available. Sometimes, the images are no longer available on your server, but you still link to them in your content. Since those no longer exist, Optimole doesn't have the ability to download them, so the optimization fails.