Jon Carnes wrote:
You wouldn't have to check the authentication of every message passing
through, but you could if you wanted to. Ideally though, you would just
check the ones that seem suspicious.
Well, if you're talking about issues of trust, GPG does this already, now.
If you like, you can only accept properly signed email, and you can go
further and only accept properly signed email from people you trust.
However, again, for this to work to stop all spam, everybody would have
to adopt it, and keys used by spammers would have to be blacklisted.
-- Dan
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