What's a decent and light(-on-dependencies) spam filter these days? Spammers have ramped up the rate about 50x in the past 48 hours and I feel like I need to modernize over my ancient handwritten procmail rules...
glib isn't a show-stopper if it's the extent of the dependencies. I've seen some stuff so awful it needs a jvm. But I am interested in effectiveness. Are there comparisons of methods, reviews of what actually works?