How is the situation different today if you add nostr.wine to both incoming and outgoing mail, or flags both read and write, because you don't know the meaning of the terms and the implications, and then as is typical you turn everything on “to try if it works”?

Since nostr.wine requires auth the app might explain that this relay is poorly suited as a general inbox, but it might still be useful for users registered with it, and then suggest adding another public one, or disabling it as the inbox (read).

@Mike Dilger recently added a relay testing tool that could be a good example of how to direct the user to the most appropriate use of relays.