Andrew,
AN> 2) Given that DNS wildcards only match on non-existent names (not name
AN> and type), what is the functional difference between covering a
AN> non-existent domain name with a MARID record vs. no record at all?
If the record says that all names covered by the wildcard are prohibited
from being a client MTA, that's a pretty big difference.
AN> 3) Is there a need to have a MARID record for non-existent domain names
AN> when there is a need for an MX record for non-existent domain names?
MX is a routing record. Marid is an authorization record. They serve
entirely different purposes, as well as being for different directions
of data flow.
AN> 4) If a wildcard-like function is desired, is iteratively dropping the
AN> left-most label by the application an acceptable solution? What are
AN> the advantages/disadvantages to this compared with using the SOA data?
That question forces a larger and more troubling one: is it reasonable
for this working group to re-specify basic DNS algorithms?
As for wildcard vs. SOA. SOA is about administering portions of the
namespace, rather than defining namespace semantics.
d/
--
Dave Crocker <mailto:dcrocker(_at_)brandenburg(_dot_)com>
Brandenburg InternetWorking <http://www.brandenburg.com>
Sunnyvale, CA USA <tel:+1.408.246.8253>, <fax:+1.866.358.5301>