michael from the ideas-are-a-dime-a-dozen dept.
Evan Harris writes "I've just published a paper on a new and unique spam blocking method called "Greylisting". The best thing about it other than achieving better than 97% effectiveness in blocking spam, is that it practically eliminates the main problem of other solutions: the false-positive. There's even source code for an example implementation written as a perl filter for sendmail, along with instructions for installing, so you can get up and running quickly."
"More software projects have gone awry for lack of calendar time than for all
other causes combined."
-- Fred Brooks, Jr., _The Mythical Man Month_