Fine, but if the goal is to force them into a smaller and smaller corner, then
the fine-grained permissions list idea that I propose, combined with a good
content filter, together does a LOT more to constrain them (and in a space
that's MUCH harder to escape from) than SPF and the like do.
And in addition, it doesn't significantly harm legitimate users (the way SPF and
other "authentication/reputation" schemes do), AND as a bonus, it virtually
eliminates E-mail as an effective vector for the transmission of viruses and
worms... thus accomplishing a MAJOR blow against zombie spambots, which create
such an otherwise intractable problem in controlling spam.
Enlighten me with a link to your plan? You make it sound like FUSSP.
Gadi.
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