Re: [exim] Antispam idea

Renaud Allard wrote:
> Hello,
>
> I just stumbled into a small idea for preventing spambots. As it seems
> many spambots like to connect multiple time from the same IP at the same
> time to the server. Each instance for only one mail delivery. This
> implies the server is busy checking all the inputs from this very same
> IP.

As others have said, not quite enough. Correlating with mutating-HELO
is currently a good tactic though. I'm doing this, triggered by
a helo-verify fail. Unfortunately, false-positives still include
EBay and Amazon.

- Jeremy