I think it depends a little on the context. I work in the public sector for instance, setting up a filter for our mail is something that, well, no one has succe

I think it depends a little on the context. I work in the public sector for instance, setting up a filter for our mail is something that, well, no one has successfully done yet. It’s not for lack of trying, we’ve had (and will continue to have) corporations with both big tech, startups and universities until we get something that’s actually better than outlook rules and a lot of manual sorting. The thing is, we cannot allow to let a single message land in the wrong inbox for more than 48hours. Obviously we don’t send “don’t reply e-mails” and we certainly never would from a domain that isn’t even ours, but filtering messages isn’t always easy. Hell, even with the inclusion of actual UUIDs for departments, and a national standard for sending secure business-to-business mail (post includes) that incorporates these standards, and throwing world leading AI science at it with Microsoft/Amazon/IBM behind it, we still employ two full time positions to handle the left overs and mistakes.