Steve Withers wrote:
Am I right in thinking Mailmarshall still allows the spam to be delivered? It just filters it.
The problem with much spam is that while you can decide to drop .cn, .kr, and .ng, plus 200/8, much of it arrives via seemingly legit sources. This can be a large ISP's smarthost forwarding spam from customer hosts that have been trojaned by spammers. That's why you start filtering after DATA, but even that doesn't always work and as Mail Marshal has shown, can be prone to false positives. A further nuisance is that you have to receive the message in order to filter it. Basically, neither DNS blacklisting nor filtering work well enough currently. And no, challenge-and-response systems aren't the answer either. -- Juha