please forgive me if this has already been widely discussed but I didn’t see it anywhere:
I’d like to propose a lookup server (or actually confirmation server).
I want a “phone book” in DeltaChat that shows me who I can contact, who will not just get an email but also “speak DeltaChat”
When inspecting a contact on Android (surly on iOS too) I get hints what messengers that contact is using. That is how I usually decide how to contact another person. And I’d like to have DeltaChat among that options too.
I figure in order to provide such functionality the respective client would need a server to ask “is this email address using DeltaChat?” That server is what I’d like to propose. Registration to that service should probably be optional.
Thoughts on privacy
When only storing and looking up hashes of the email addresses, the plain email addresses would only be needed for registration and deregistration (for verification). People wouldn’t have to “leak” their phone books for bulk lookups. Contact data couldn’t get stolen, since it’s not stored.
I really don’t know anything about the organizational structure of DeltaChat. I don’t know how such a server would be maintained, administrated or even financed (I could see myself helping to implement it though).
I just hope to spark a discussion and maybe help.
P.S.: there was a somewhat related discussion but it didn’t go anywhere and was only aimed at an proprietary third-party service.