Gmail has had the "important" flag for ages, and that's done automatically. The issue is training the AI to work for your data (e.g. I find Gmail still hasn't p

Gmail has had the "important" flag for ages, and that's done automatically. The issue is training the AI to work for your data (e.g. I find Gmail still hasn't picked up the differences in spam I get, and so some specific spam still going to my inbox, and some specific ham ends up in spam). Unfortunately, just because one provider provides a good AI, doesn't mean others will (and in a work context, you may be stuck with the bad one).