Can anyone tell me what this site is?

fromsubjectreceivedsize.com

It just appeared for me for the second time after I clicked on something – I'm not sure what! – from Gmail's inbox. I definitely didn't click on an ad, because. I can't reproduce it, except by accident...

[ Unlinked. It's a parked domain, after all. – Ionut]

Did you perhaps click a Web Clip?

I have web clips turned off. It's pretty weird; I'll see if it happens again. It is a parked domain but I don't know what I clicked on to get there.