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Subject: Re: Preventing email abuse
From: Marco d'Itri (mdlinux.it)
Date: Mon Jun 19 2000 - 15:41:55 CDT

On Jun 19, Wietse Venema <wietseporcupine.org> wrote:

>Out of the box, Postfix permits only a few hosts to relay their
>mail through it.
Except if you have a cable modem. Then you will relay for most (if not
all) cable modem users in the world, because they are assigned IPs in
the 24.0.0.0/8 netblock.

Thinking about it, ARIN, RIPE and APNIC too are assigning addresses to
ISPs from the former A classes space. 

-- 
ciao,
Marco