Seems like AI is in a pretty good position to do that tbh.

You mean filtering? That could get extremely expensive computationally, though. Tools like Rspamd support LLM-based filtering, but traditional Bayesian filtering is vastly cheaper and more computationally efficient. Hm, maybe LLMs can be used as an additional signal for ambiguous messages rather than as the primary filter.

If you are thinking using AI to classify messages, the scale of email spam is so massive that using conventional techniques won't work. It won't make sense energetically speaking IMO.

I think techniques like HashCash by Adam Back should be revisited.