Dint proof of work originated as a way of fighting spam? I wonder though why it didn't become widespread. Instead of shadowbanning/blocking the providers like VRZ could just increase the required POW difficulty.
Re:What's an SPF Record?
by marcbradshaw on Wednesday February 10, 2021 @01:07AM
(#26086130)
and of course spammers would never have access to vast botnets to do that work. POW is (imho) a terrible idea.
Unfortunately, we are back to the age old question. How can we have an ecosystem where anybody can email anybody without it being taken over by spam?