[Unbound-users] unbound 1.4.6 does not seem to have support of additional sections for NAPTR records

[Florian Weimer]

* Stephan Lagerholm:

> Florian Weimer:
>>I'm really not sure if additional section processing is worth the
>>complexity.
>
> For a normal Internet DNS, getting the MX as an additional RR it
> certainly is worth it to save one query when mails are being sent.

There is no way to signal the absence of an AAAA RRset, so you still
have to make another round-trip to the DNS resolver if you're
IPv6-enabled and the MXes aren't.  (A and AAAA RRsets aren't cached as
an atomic unit.)