Re: [Exim] RFC: Fighting Spam due to forgeries of outblaze …

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Author: Anand Buddhdev
Date:  
To: exim-users
Subject: Re: [Exim] RFC: Fighting Spam due to forgeries of outblaze domains
On Thu, Feb 19, 2004 at 10:05:34PM +0530, Suresh Ramasubramanian wrote:

> >deny    message       = OUTBLAZE forgery. Go away! This is not from
> >outblaze address
> >        !hosts        = 205.158.62.0/24 : 202.86.166.0/24 :
> >        210.177.227.128/28 : 203.86.162.161/28

>
> Don't hardcode our IPs. If we renumber out of these or something you are
> left with a stale ACL.
>
> Whatever we have will have rDNS in the outblaze.com domain


A spammer who controls their own rDNS will then be able bypass the
ACL. Either way, there's a problem.

--
Anand Buddhdev