MX Anti-Spam measures
I'm curious to see what you guys are doing to cut down on spam (if you run your own MX).
I use Postfix as my MTA of choice, and have configured it fairly well to block most "uninvited" mail (not to mention making sure it's not an open relay). I've also employed postgrey and policyd-weight. I'm still debating whether it's bad enough to bring in spamassassin.
So I'm just getting a feel for what you guys are doing to stop spam/viruses at your MX.
I just saved a bunch of money on my car insurance by fleeing the scene of the accident!