What exactly is "domain spoofing"? I think this is happening to my client right now too. I was checking out their site stats and noticed a whois lookup from some other site, and I checked it out. (The same happened to my own site recently too!) When I got to the WhoIs search page, a different url was listed at the top, and all the other information was correct. When I clicked on soandso.com's link, it brought me to my client's homepage!

I "sucked" the pages at that domain name (ftp) and found only the homepage, only the major buttons (no javascript or rollover buttons, etc.) and that was all that was there.

Regarding domain spoofing: When I sent a friend to that url, it was not available. So, is this spoofing my ISP? Or are they 2 different things?

I also have not been receiving any legitimate email from my own site for almost 2 months now! I AM however, getting plenty of "fake" web design requests using the forms on my site. I found out one of the senders was a hacker. So, is my email address on a Black List now too?
Since my site doesn't have email addresses posted anywhere in the HTML, how do you protect your site's forms from being filled out by hackers or their software? And is this a result of domain spoofing?