"Brett Robson" <jet_boy@deja.com> wrote in message
news:bmnptk02d91@drn.newsguy.com...
> On Fri, 17 Oct 2003 02:50:24 GMT, Marc  ...
> >
> >
> >my spam filter, guaranteed 99% effective or your money back:
> >
> >1) the email originates from an open proxy
> >2) it contains a URL from a site hosted in China or Brazil
>
> That's not easy to do programmatically.

I'm not a programmer, but reverse DNS lookup? IP ranges for China & Brazil
are defined. Same for open proxy, there are numerous open proxy lists based
on originating IP addresses.