I wonder how email could be fixed if there was no Spam AI filters. I guess there would be domain whitelists, or rather an user specific domain whitelist. Ever

I wonder how email could be fixed if there was no Spam AI filters. I guess there would be domain whitelists, or rather an user specific domain whitelist. Every mail would be spam or grey list by default until the user explicitly decides he wants to allow a domain. It would be fastidious, but at the same time I would have greater control over my email, because automated email are not spam but I also want to sort them and delete them.