Apex domains cannot have CNAME records.
Question and response
Question
dig emsend1.com. NS
Answer
emsend1.com. 5 NS ns-1509.awsdns-60.org.
emsend1.com. 5 NS ns-388.awsdns-48.com.
emsend1.com. 5 NS ns-835.awsdns-40.net.
emsend1.com. 5 NS ns-1669.awsdns-16.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0