Last time I mentioned that spammers wereperfectly capable of adopting their practices to defeat anti-spamheuristics like requiring a valid EHLO or reverse DNS, and so suchheuristics were, if effective and widely adopted, at best a temporaryfix. This raises an obvious corollary about good anti-spam heuristics.

Since spammers will adopt when it is both useful and possible, a goodanti-spam heuristic is some characteristic of the message or of how itis transmitted that the spammer cannot easily change. While people havemade various

One of the things that's led to the university Internet environmentchanging (per an earlier entry ) is thatuniversities are open environments in general and especially in termsof services. In this they are fundamentally different from companies,which can be much more closed and closeted environments.

I think that there's three reasons for this. First, there is a muchdifferent relationship between many people at the university and theuniversity. In a company, everyone 'at' or 'in' the company is workingfor