Re: Pre-server spam filtering to be reviewed in Network World
The review is now published and can be read at:
Pre-server spam filtering to be reviewed in Network World
As an interesting corollary to this article, I have submitted a review to Network World which will be published in two weeks on 16 enterprise-sized spam filters, including their spam filtering performance and speed, as well as a host of other features. I'll come back and post a URL for reference when it is available on the web.
I can't share the results before publication, but I can say that we looked at a very different set of products, specifically those which take SMTP in and feed out SMTP, so these would be considered prefilters before an enterprise mail server. Because Network World is aimed at a corporate networks managers, I didn't directly review any open source products, but several of the commercial products, of course, have open source cores. I also considered a very different set of requirements. For example, in a network with 10,000 users, individual training of filters wouldn't be practical except in a whitelist/blacklist sense.
Anyway, if you found this interesting but think that you need a more commercial answer to spam's problems for large numbers of users, then I'd recommend you take a look at that article when it comes out.