Egregoros

@atax1a @navi When done with Google, one must also deal with Microsoft as another 800lb gorilla.

I don’t know what Proton is doing *in SMTP* that wouldn’t be addressed by implicit TLS transport, which was effectively given up on as an interoperable mechanism with the reassignment of port 465 to implicit TLS submission.

Any ideas for revising SMTP should start with understanding similar efforts in the past & ongoing. A good start would be a look at the state of SMTPUTF8. It’s not pretty