Getting hammered by spam virus :-(

I'm getting hammered by the Gibe-F virus. My post-filtering nicely disposes of
it, but that isn't stopping it from clogging my mail server. I'm getting
approximately 3 per second, i.e., about as fast as my mail server can handle
incoming mail, and that's not counting the ones that are getting dumped by my
blackhole lists because they're coming from dynamic IP's (alas, most of them
appear to be sent through their ISP's static SMTP server).

Any idea how I can effectively deal with this spam storm? This is ridiculous!

-- 
Eric Lee Green              eric@badtux.org
Linux/Unix/Storage Engineer Seeks Job -
  see http://badtux.org for resume