a better example is, say i only want people to inbox me on nostr.wine. This is already a relay many pay for, and many should pay for. They protect the DMs with nip42, and they're solid. But if i set this as my only inbox, clients will just get silently rejected.
Discussion
an element of the use cases for NIP-42 nobody except me is always going on about is that it should be required to access DMs. PEROID.
you sign with an npub that isn't either the sender or receiver of the DM... straight to jail
