Postini's patent is on the specific technique of preprocessing
someone's mail by setting up the MX to point to an offsite
preprocessing server that redelivers the laundered mail to the actual
server. It's not a patent on general mail relay.
I've seen pretty persuasive evidence that people other than Postini
did this before Postini and published the fact that they were doing
so. If someone wanted to spend the money to bust this patent, they
could, but patent litigation is expensive.
Has Postini said what they plan to do with the patent? Is it
defensive, to keep anyone else from patenting the same thing, or do
they plan to go after their competitors?
Regards,
John Levine, johnl(_at_)taugh(_dot_)com, Taughannock Networks, Trumansburg NY
http://www.taugh.com
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