Peter Duniho wrote:

Again, have you even bothered to read my post? ISPs being blocked are not
just small ISPs with "IP blocks that are near known spammers". In fact, the
ones I've had the most trouble with are AOL, Comcast, and Cox; typically,
when they get blocked, it's a *sub-block* within their total allocated range
that is blocked. They are NOT being blocked as a result of being adjacent
to some spam-friendly ISP.

Blocking the dialup/cable/dsl modem pooled IP's of another ISP are the
necessary evils of being an ISP. You don't want to receive spam/virii
from their users computer acting as their own SMTP server...

Rooting out the true SMTP servers of each ISP (especially a stealth
spammer like E@rthlink or a proxy based one like A0L) is the tough part
of IP blocking. C0X and RR both use regional mail servers which make it
that much harder again. Anybody on Comc@st or @delphia, needs to get a
Hotmail or Yahoo email account...

Getting spam from adjacent blocks, just helps keep the filter file list
smaller, as they are added together...