Mystery Puzzle Has Us Confused

Earlier this morning I received an email from an unknown address containing nothing but an image, without any explanation. It appears to be the technical data of something, but it has everyone here at StartGame completely stumped. The only sensical text is a list of site names – a quick look reveals that they too have received similar images. Here’s ours:

Can you unlock the meaning? Remember, you can click on the image to get the full size version.