>> 4. It isn't clear how a CA would go about securely verifying that a 
>> mail hosting provider like GMail is authorized by a domain name owner 
>> (e.g. example.com) to request and use a certificate with a srvName for 
>> the domain name (e.g. GMail asking for an _imap.example.com 
>> certificate).

> The the CA's job, the certificate would be obtained by the customer and 
> provisioned by the customer via a customer admin portal.

I think what's being asked is how would the CA do the verification before 
issuing the cert?

>> In practice, traditionally standardizing such practices is done in the 
>> CABForum. If CABForum is inappropriate here, then how will such 
>> issuing practices be standardized?

> CAs should never issue certificates for a domain to a third party.
> So there's nothing to standardize.

We do it all the time. You outsource your web site to a hosting company, and 
the hosting company applies for and gets the cert on your behalf.

-Rick

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