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Cloudflare reverse DNS SERVFAIL, normal?

> On Aug 29, 2016, at 17:01 , Mark Andrews <marka at isc.org> wrote:
> In message <20160829234737.GA16137 at cmadams.net>, Chris Adams writes:
>> Once upon a time, Mark Andrews <marka at isc.org> said:
>>> The following is general and is not directed at Cloudflare.  I know
>>> some people don't think errors in the reverse DNS are not critical
>>> but if you are delegated a zone it is your responsablity to ensure
>>> your servers are correctly serving that zone regardless of where
>>> it is in the DNS heirarchy.  Failure to do that causes additional
>>> work for recursive servers.  If you don't want to serve a zone then
>>> remove the delegation.
>> You are assuming that an authoritative server operator has some way to
>> know all the zones people delegate to their servers, and remove such
>> delegations if they don't want to handle them.  That is a wrong
>> assumption.
> They have methods.  They choose not to use them.  See RFC 1033
> COMPLAINTS then after that the court system.
> Mark

Let us review this and compare to your statement?