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

[Stephan Lagerholm]

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.)

Good point. I wonder how many MTAs that actually check that...