Earlier quoted context omitted.
You're coming from a position that email is good and it's worth configuring it to work well. But I don't particularly like email. I have zero interest in setting up aliases or filters when the problem simply doesn't exist when I use a better tool.
So your messenger app read your mind? Pretty sure you create a whitelist on that too, yes? Of phone numbers, usernames, or …email addresses… depending on what the app uses, that you wish to hear from? Check out Spike for IOS. I’m not saying you have to USE it, but that it’s a UX problem, not an “email” problem.
No it just read my pre-existing social network graph. And then very accurately predicts who I might want to add to that graph. But practically speaking it comes out to the same thing - I have never had to create a messaging whitelist.
While email and email tooling is completely ignorant of my multiple social network graphs that are stored in various places on the Internet.