What relay is that? I'm just using the ones you're app connects to and my personal one on umbrel. What benefits does it bring?
Ah just realized the website is the name nostr.wine checking it out.
It's a test relay for private messages. It authenticates you so that each user can only download their own DMs.
what is difference between standard DMs on nostr and this one?
It works for both, the old DMs and the new ones with GiftWraps. The main benefit is to now allow others to download your messages and see your metadata.