Bad Behavior has blocked 628 access attempts in the last 7 days.
Powered by LifeTypeSomeone on the postgrey list (Matthew, who apparently likes drinking coffee, as that is part of his email address) sent a script that he uses to report on his mail/spam.
I modified it to work on my systems (and included it below), and here is the output for the last five days:
Rejected by RBL: 21147
Rejected by greylisting: 9917
Rejected by bad sender/receiver information: 959
Tagged as spam: 1457
Real email: 6278
So, ~4000 (50%) are rejected every day simply by being on a known blacklist, ~2000 (25%) are slowed down by greylisting (maybe are retried, maybe aren't), ~200 (2%) due to the spammers faking from or to addresses (or real people mistyping addresses), ~300 (4%) ending up in spam folders, and ~1200 (16%) actually ending up in inboxes.
Taking the inverse of the inbox mail, that means that 84% of email coming into my server is being thrown away one way or another. I'm glad I have lots of filters to block almost all of it.#!/bin/sh
LOGS=/var/log/mail.log.*.gz
echo -n "Rejected by RBL: "
zcat $LOGS | zgrep -c ' 554 5.'
echo -n "Rejected by greylisting: "
zcat $LOGS | grep -c ' 450 4.2'
echo -n "Rejected by bad sender/receiver information: "
zcat $LOGS | grep -c ' 450 4.1'
echo -n "Tagged as spam: "
zcat $LOGS | grep -c 'result: Y'
echo -n "Real email: "
zcat $LOGS | grep -c 'result: .'
Well I'm beginning to find that mail servers not from big companies get blacklisted for no good reason. So be carefull with that.
What blacklist? I only use the list from spamhaus - and they are quite conservative. spamcop is useful for tagging mail, but not for blocking - and they say that in their instructions. It seems the other blacklists are similar - they aren't good enough for straight blacklisting, but only tagging.