On Wed, 2004-02-11 at 17:06, Chris Edwards wrote:
> On Wed, 11 Feb 2004, Ron McKeating wrote:
>
> | OK, I have finished our selective spam filtering system. It uses a mysql
> | database to store the userids of anyone who for whatever reason wants to
> | receive all their spam. If you are not in the database then anything
> | with a spamassassin score over 7 is rejected. It is more selective than
> | just using whitelist_to in spamassassin as it will only deliver to the
> | recipients who are in the database. It also will deliver to students as
> | we do not spam filter for them. Even if there are mixed staff and
> | student addresses in the envelope header.
> |
> | So if any of you are interested I documented how I did it at
> |
> | http://www.sprocket.lboro.ac.uk/~ron/email/SPAM_filtering_system.htm
> |
> | If anybody can see any gotchas I would appreciate you letting me know.
>
> Hi,
>
> This is pretty much how we started off - if ANY recipient is a spam-lover
> then ALL recipients get the spam.
>
> However we found quite a lot of spams sneaking thru to spam-haters, simply
> because the spammer happened to include a spam-lover in the RCPT list.
That is the whole point of what we did, we handle each person in the
RCPT list differently. If you check the web page I gave you will see
there are two seperate transports, one for spam lovers and one for spam
haters.
Ron
>
> ( our initial estimates were that this would be rare, but in pratice it
> turned out to be quite common... )
>
> So now we use the selective defer scheme as discussed before. It seems to
> work fine. See Alan's outline:
>
> http://www.exim.org/pipermail/exim-users/Week-of-Mon-20031006/061151.html
>
> Cheers
>
> --
> Chris Edwards, Glasgow University Computing Service
--
Ron McKeating
Senior IT Services Specialist
Internet Services and Software Solutions
Loughborough University
01509 222329
