Re:dont forget ... (Score 1)

You can make it even simpler. Don't accept mail from likely abuse sources, from dynamic IP addresses, or from known abusers. Those three blocklists get rid of an enormous amount of my spam.

Taken along with a few select country blocklists (I use China, Taiwan, Hong Kong, Korea, Brazil, and Argentina), you can go from a flood to a trickle in no time. China is a Very Special Case -- they're completely filtered at the borders now. If they ever clean up their act, they may get to pass packets again, but I'm not holding my breath. In the meantime, they can enjoy their shrinking view of the Internet.