My proposal to use 'wss://nostr-pub.wellorder.net' was related to the login- and registration process on https://nip05.social where you need to enter a relay that the system uses to send your code to.

In your nostr client you of course also need to be connected to that relay in order to receive the message.

I am using Amethyst (on Android) as client. This client connects to 19 relays at the same time. The mentioned relay above is just one of them.

When I post something, it is automatically posted to all 19 relays.

And you are right. You must bei connected to at least one of These relays in order to receive my message.