Problem with automatic anti-cheat is (from my experience), that automatic detection can be triggered by A LOT of random events caused by regular players. There isn't that one single parameter you can observe and ban someone.
Just to add this: I heard from other forums about the hotmail activation email problem too. So hotmail probably is just a bad choice for use for forums.
Made with curd, "Crème fraîche" (dunno the english word for it), chives, just a little (!) garlic, lots of salt and mixed peppers, and these frosted mixed herbs if you like it. Important is to NEVER use mayonnaise. Also, just a little of sugar gives a nice taste.