Hello,

I've just reviewed version 36 of this draft. Found some nits, and I really have only one question.

In section 4.5 RFC 1035 is referenced on how a TXT record is structured. However another question I got is how to deal with multiple _dmarc TXT records? Is that allowed or is the assumption there is only one?
(Admittedly I haven't read the normative references, so it may be explained there, if so I'm happy to be told, "Miek, go read the references.")

Also section 4.5:
   
   DMARC's use of the Domain Name Service   => Domain Name System

In section 4.10, there is this text:

   If x < 8, remove the left-most (highest-numbered) label from the subject domain. If x >= 8, remove the left-most (highest-numbered) labels from the subject domain until 7 labels remain.

It took me quite a while to realize that '...until 7 labels remain' is the key difference here. This may benefit from some slight rewwording?

Typos:

* section 4.10: discovry - discovery
* section 5.1.8: [Author Domain]{#author-domain) -> [Author domain](#author-domain)