What happens to the false positives - ie the ones you denied that were real? Do people get a way to prove they really are legit? (Matt Cutt's blog claimed I w

What happens to the false positives - ie the ones you denied that were real? Do people get a way to prove they really are legit? (Matt Cutt's blog claimed I was a spammer when I made a comment about two factor authentication - I have no idea why. It told me to email the administrator to get it accepted but of course provided no clues on what address to use etc so I didn't bother. I'm betting the anti-spam software is claiming a victory when it was actually a failure.)