Re: [exim] DNS based host name Whitelists

Ian Eiloart wrote:
>
>
> --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.
>
>


I wonder how I could have a conditional that ran differently for one
minute out of every 10 minutes.