[ On Wed, October 29, 1997 at 15:12:46 (-0800), Dalvenjah FoxFire wrote: ]
Subject: Re: Spam Control Considered Harmful
The only reason I can think of that would stop this would be if a user subscribes to earthlink, but uses a UUnet dialin, that customer's software would be set up to use the Earthlink SMTP servers.
This should only present a minor complexity. If the authentication information can be retrieved from the correct home ISP then there should be no trouble identifying that ISP and adding the right filter to their profile.
Keep in mind again I don't yet know much about how this would impact router performance..but wouldn't one be able to set up access-lists, then, that would allow port-25 connections to a defined list of SMTP servers (say, UUnet, MSN, and earthlink SMTP servers), and prohibit everything else?
One more filter rule in the existing list for preventing IP spoofing shouldn't make any significant difference.
Why aren't they doing this?
Probably because they're not preventing IP spoofing yet either. -- Greg A. Woods +1 416 443-1734 VE3TCP <gwoods@acm.org> <robohack!woods> Planix, Inc. <woods@planix.com>; Secrets of the Weird <woods@weird.com>