[Mimedefang] Powerful anti-spam rule :-)

David F. Skoll dfs at roaringpenguin.com
Sun Nov 10 09:04:01 EST 2002


On Sun, 10 Nov 2002, Dirk Mueller wrote:

> This rule is also deployed on many major sites, like e.g. but not limited to 
> lists.sourceforge.net.

However, there's a far more serious problem which would prevent me
from implementing reverse-tests in MIMEDefang:  Our friends [sic] at
Brightmail have patented this technique (US Patent 6,321,267,
"Method and apparatus for filtering junk email")

I have no doubt that the claims would not stand up to serious scrutiny,
because I bet there's prior art, but I don't have the resources to engage
in a patent fight. :-(

--
David.




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