Follow
maddy.email informed us that MTA-STS exists so now remotes trying to send us emails have a way to know that they Must use TLS now
maddy.email informed us that MTA-STS exists so now remotes trying to send us emails have a way to know that they Must use TLS now
(to be clear it is on the remotes to enforce that; so remotes that don't know about MTA-STS can still use plaintext if they must (or if a MITM strips out the remote’s STARTTLS command))