[gdne]

It isn’t relevant to crypto. This is specifically about spam email mitigation. I don’t agree with their conclusion, which is “we can’t reduce spam to the level we’d like without imposing undue burden on legitimate senders so we shouldn’t do it at all”. The “all or nothing” doesn’t make sense. They never consider things like whitelists (legitimate senders need to do zero work), different levels of work required for different senders (eg a sender’s IP address isn’t recognized so dramatically increase the work requirements), etc.