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.
( 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
