Re: [exim] IPs which spam for many, many, domains

On Tue, 16 Aug 2005, Jeremy Harris wrote:

> Wouldn't it be clearer to reject in your mail acl, on
> $sender_host_address matching your file?

But the sender host address will typically be some open relay or
zombie which has so far escaped the DNSrbls. The idea is to catch
them by recognising (via the MX and A records) that the MTA which
services their envelope sender domain has an IP which is within a
range controlled by spammers. This will be in general a completely
different IP than the IP which is offering us the mail.

best regards