You're two steps ahead of where I am.

I'm talking about a basic acknowledgement that the resume was received. An email like this would suffice:

"Hello. Thanks for applying to FooCorp. We're currently processing resumes in the order they are received. If you meet our needs and we're interested, we'll be in touch within 4-6 weeks."

The fact that the job sites don't even enable this kind of tracking and behavior is, frankly, very disappointing.