Comment by perching_aix

I don't get why + addresses always come up in this. They're machine-undoable by design.

Using randomized relay addresses instead gives you an immensely higher confidence that when a given contact address starts getting spam, it is misuse stemming from a specific entity. Especially if you rotate it at a fixed time interval, cause then you can even establish a starting timeframe.

Still not perfect but it can never really be, and not even out of email's fault. As long as DNS and IP addressing rule the world, there's only so much one can do. Once identity is private-default, it becomes a secret handling problem at its core, a capability these schemes were never designed to provide.