Re: [exim] Heads up?

John Palmer wrote:
>>
> Challenge-response systems (such as TMDA) are the reason that
> our spam load has been cut down by 95%. I highly recommend systems
> like this.
>
> If the sender gets one of these "challenge" messages, he just needs to
> let the recipient know "hey -put me on your whitelist".
>
> Works like a charm.

Do the words "collateral spam" mean nothing to you?

- Marc