[dns-operations] Looping wildcard CNAMEs can be an obstacle for DANE, (googledomains.com-hosted example)

[Jeremy Harris]

On 17/04/18 13:55, Tony Finch wrote:
> Viktor Dukhovni <ietf-dane at dukhovni.org> wrote:
>> The Postfix DNS layer does not look for direct (a -> a) loops and
>> recurses when the answer is a CNAME (in case the resolver did not
>> recurse all the way to the answer).
> 
> That should be unnecessary - part of the point of a recursive server is it
> does the work for you

Exim also.  The coding dates from 1997.
-- 
Jeremy