Apex domains cannot have CNAME records.
Question and response
Question
dig hubspotemailqa.com. NS
Answer
hubspotemailqa.com. 5 NS peyton.ns.cloudflare.com.
hubspotemailqa.com. 5 NS ines.ns.cloudflare.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0