NIP-17 describe: "Clients SHOULD publish kind 14 events to the 10050-listed relays. If that is not found that indicates the user is not ready to receive messages under this NIP and clients shouldn't try.". So I've added small panel in the message form to inform user. https://files.catbox.moe/alck7z.jpg
>hello >are you single? Unhinged.
Dang, I can't send "and ready to mingle?" x3 Nice =3 (I'm not a native, but I think this is a better sentence: "This user doesn't have inbox relays. You cannot send messages to them.")