article on blocking by subnets

[Gyepi SAM]

On Mon, Dec 02, 2002 at 08:38:33PM -0500, David Relson wrote:
> At 08:19 PM 12/2/02, Graham Wilson wrote:
> Here's a bit of info on ip addresses:
> 
> IIRC, subnets come in 3 basic sizes - class A, class B, and class C.

These can be further divided using Classless Inter Domain Routing (CIDR)[1]
which complicates matters in that the suggested algorithms may penalize non-spammers who happen to use a related CIDR block.  This actually cuts both ways:
you may reduce the spamicity of a message if it happens to come from a CIDR block related to a non-spammer.

In either case, I am highly doubtful that a single token will make much of a
difference, but am happy to be proven wrong as long as I don't have to write
the code.

[1] See RFCS 1517 - 1520 for more technical info
http://www.faqs.org/rfcs/rfc1517.html

and http://public.pacbell.net/dedicated/cidr.html for less technical one. 

-Gyepi