After being in the field of a systems admin I have met a large group of various spamfilters. Even at home I played with some of them and found that they were quite effective. Though lately a decrease is being seen on my hosts that make me wonder. Spamassassin’s spamd (which I use) does not get any new updates for some time already. That might mean that all spam is the same as it always had been, or something else is fishy.

My spamfilters were quite effective till around two weeks ago. Effectiveness of around 90% suddenly decreased to 66% (as per spamstats.pl which reports the spamd output). I also setup some relays just a few days ago that filter a lot of known blacklists already and prevent them from even entering the system. Some of the domains that I manage had been altered to use them instead (not JR-Hosting domains that is).. I also see a large amount of blocks there (As I expected). But still for every 1000 emails that are being send every day at the moment (ok the volumes aren’t impressive :) ) 330 (at least) are spam in the last two weeks.

I could retry to train my filters again ofcourse (and train around 200 emails or so instead of too much). If there are suggestions, please let me know!