Pre on Nostr: I think that relays don't talk to each other. If you set up your own relay and posted ...

I think that relays don't talk to each other. If you set up your own relay and posted to only that relay then people would check your relay to see your posts.

If it was "private" in the sense of "secret" nobody but you would see your posts.

You can be the only person allowed to post to it and have everyone else able to read it.