Iroh doesn't use DHT as its main discovery mechanism. It uses DNS/pkarr and relays as the primary method. DHT is a separate feature if folks like to do that, we don't have it on by default and don't have it on the public relays.
The whole idea is p2p but trying to be realistic about what network environments actually look like.
Iroh is definitely near the top of my "play with it some time" list, that pragmatism is very important for building normal things that normal people will be using :)
Thanks for clarifying that. So does that mean Iroh still require a DNS server or domain name even though it doesn't rely on IP address?
I thought dial by key means the other party just need to be on internet and has the right key/pubic identifier then they can reached.
Where does the message resides if the other end is NOT online?