If you login to #Nostria now with a known dead relay, you'll get this notification at the bottom of the app:
On the Account Relays there is also a very clear indicator if you're using a dead relay. I found BitcoinMagazine (npub1t8a…56yu) has a few of them... maybe time to update?
Next quest is how do you find relays? That is coming very soon!
Adding this to #asknostr if anyone wonder how to clean up their #nostr relays.