Author: Wakko Warner Date: To: Fred Viles CC: exim-users Subject: Re: [Exim] RFC: Fighting Spam due to forgeries of outblaze domains
Keep me in CC
> | On Thu, Feb 19, 2004 at 10:05:34PM +0530, Suresh Ramasubramanian wrote:
> |...
> | > 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.
>
> Not if you also check that the PTR name looks up to the same IP.
Last time I looked, Exim will only set the hostname if the rdns name
resolves back to the same IP.
--
Lab tests show that use of micro$oft causes cancer in lab animals
