I think the question you should be asking is why the email standard has not evolved in a way to give users more control. Like + addressing that gmail uses is a

I think the question you should be asking is why the email standard has not evolved in a way to give users more control. Like + addressing that gmail uses is a great user control but its not supported everywhere. Extending on features like that would really empower users to control content in their mail box more. An idea I have is if i could do this: ‘<primary>@<controllable subdomain>.gmail.com’. Then change the subdomain part as i feel fit. Similar to plus addressing but dont allow no subdomain so its hard for marketters and spammers to remove.