Know of https://github.com/nogringo/nostr-relay
Specifically built by nostr:nprofile1qqsty2cxkpgl653jje4fx39xxnv4ds7uxwnltmxu4k0dz8wugys20uspr4mhxue69uhkummnw3ez6vp39eukz6mfdphkumn99e3k7mf0qy2hwumn8g...
I created it because no others relays care about DM privacy. I updated NIP 59 yesterday to fix a privacy issue. And implemented the updated spec today inside the relay.
https://openspecs.uid.ovh/spec/npub1kg4sdvz3l4fr99n2jdz2vdxe2mpacva87hkdetv76ywacsfq5leqquw5te/nip-59
https://openspecs.uid.ovh/spec/npub1kg4sdvz3l4fr99n2jdz2vdxe2mpacva87hkdetv76ywacsfq5leqquw5te/nip-59
☕1