Re: A bit more protection for the black hats
It seems to me your system is a tad too complicated.
As for me, I have a programmed my own spam filter and it follows these rules :
1) If I have already accepted mail from that address, then it passes through (whitelist)
2) if my email is not specifically in the SendTo, it is spam (kills all those generic mails sent to God knows who I couldn't care less about)
3) if the ReplyTo domain does not match the From domain, it is spam (go ahead and pretend to write from Microsoft while sending from GMail, I dare you)
There are a few more criteria.
I don't need the IP address, and I don't need the WhoIs, although I do understand your use of it.
My system uses less bandwidth though.
Oh, and I'm just a private person. My needs are not those of a company, I acknowledge that.