What would make the scheme more robust is being able to identify the
transactional and permission based message empirically. So
a spam filter
knows to expect that they will come from a small number of senders
authorized for that express purpose.
Phill
Can I enquire as to whom you work for, you seem to have a
purpose in your comments
It shouldn't be too difficult to find out. Look at my email address.
I am the Principal Scientist.
My customers include 85,000 Internet merchants who use our payment
services, they end up bearing the loss of spammer phishing expeditions.
Phill
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