[OpenID] A Case for OpenEmailID

[Martin Atkins]

David Recordon wrote:
> Right, but my argument was that you could delegate all of 
> degeneration.co.uk to a Provider but not delegate 
> mart at degeneration.co.uk to Provider A and bob at degeneration.co.uk to 
> Provider B.
> 

Perhaps, but delegation in the URL model is delegation to an OP-local 
identifier, not to a provider.

So I would have to associate the whole of my domain with a single 
OP-local identifier, not just with a provider.

What makes supporting separate settings for each user so difficult? My 
old DNS-based email discovery prototype had no trouble doing this, but 
I'm not familiar enough with this new proposal to understand why/whether 
discovery on the whole email address is difficult.

I think it's preferable to retain feature-parity between email-based and 
URL-based identifiers, including doing the discovery based on the entire 
address rather than just the authority part.