On Sat, 2010-01-23 at 08:26 +0000, Chih-Cherng Chin wrote:
> On 2010-01-21 05:17 +800, Email Archive wrote:
> > For me greylisting all mail eliminates most of my spam and I hardly ever
> > receive any calls regarding it.
> Greylisting is indeed very effective at filtering out bot-sent spam,
> which account for more than 80% of global spam now. You can also couple
> it with auto whitelist to reduce transimission delay caused by greylisting.
> Whenever your users send e-mail, the recepients are very likely to reply.
> So why not let their reply bypass greylisting (with exim ACL) automatically?
>
> Please refer to the following posts for some implementation idea of auto
> whitelist for exim:
> http://www.gossamer-threads.com/lists/exim/users/68306#68306
> http://www.gossamer-threads.com/lists/exim/users/68924#68924
A simpler approach which more easily scales to multiple mail servers
might be just to check for one of your own message-ids in the
References: or In-Reply-To: header.
--
David Woodhouse Open Source Technology Centre
David.Woodhouse@??? Intel Corporation
