Why is email spam less important?
You assume that lack of importance is the (major) cause of inaction. But
John Klensin already told you a very different reason why he isn't going on
with 5321bis: Do anything with the core of the mail system (and spam is at
the core now), and advokids drown you in arguments. It's not that mail is
objectively unimportant or that John thinks it's unimportant, it's that
whoever writes the RFC pays a high personal price.
John wrote much more. My eyes glazed over. But I think this is the MSB.
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