I get around 50 bytes of spam per second on the average.
Normally, I use bogofilter as my main spam prevention measure, however, earlier today I ended up having to retrain the thing. Reason? Database grew to over 50 megabytes and choked. It took me quite a while to find out that the reason the database is limited in such a way has nothing to do with bogofilter itself — rather, it inherits the limit Postfix sets for the mailbox size through procmail and imposes it on all files it may access. Which should have been a FAQ for three years by now but wasn’t.
I switched bogofilter from BerkDB to SQLite and the database grew to a whopping 100 megs, but hopefully it will be less of a corruption risk. But with the retrained database, that still wasn’t enough — I get way too much spam and too little legitimate e-mail. About one real message per 5000 or so of spam, so the filter is acting up.
I tried increasing the number of RBL lists checked: relays.ordb.org, dul.ru, sbl-xbl.spamhaus.org, dnsbl.sorbs.net, bl.spamcop.net, combined.njabl.org, but that STILL didn’t stop the flood. I implemented SPF checking, but less domains have it implemented than I’d like, so it didn’t help either.
I guess I can do no better than greylisting with postgrey, but if even that doesn’t help, I’m going to be really, really, really annoyed.
