Re: [exim] DNS based host name Whitelists

--On 22 June 2006 09:08:04 -0700 Marc Perkel <marc@???> wrote:

> That are a lot of servers out there than never send a single spam. So -
> why not track them and build a DNS whitelist server to distribute the
> lists?

Past performance is no guarantee. There's nothing to stop all of those
servers being compromised tomorrow.

However, you could borrow an idea from quality engineering, and test random
samples. If you get no spam from a particular source for a given period of
time, you reduce the sample rate. When you get hit with spam, increase the
sample rate - probably to every email.



--
Ian Eiloart
IT Services, University of Sussex