I work at a webhosting company that hosts a few thousand domains for people.
We use Qmail + Vpopmail (+ Squirrelmail, if they want to read their mail on the web) - on FreeBSD computers. We'd like to help block all possible spam from our client's boxes, of course, dumping it all into a [EMAIL PROTECTED] box - if they want to go look at it. Because many of our clients like to use the webmail, we can't rely on their home-PC client-side email app to catch the spam for them. What's the best plan for this kind of setup? I'm assuming: - clamd first kills all emails with viruses - a system-wide spam-filter kills all positively-spam emails with a very high spam-probability count (or coming from known spam servers, etc) - a user-controlled, user-taught Bayesian filter catches spams they've taught their preferences to catch. ... or am I approaching this wrong? Any benefit to having two different kinds of spam filters, so that one (SpamAssassin?) goes system-wide, and another (Dspam?) is the user-trained one? Anyone done this kind of setup successfully for thousands of users? Any suggestions or pointers to articles appreciated. - Miles
