Apex domains cannot have CNAME records.
Question and response
Question
dig e2ma.net. NS
Answer
e2ma.net. 5 NS ns-379.awsdns-47.com.
e2ma.net. 5 NS ns-592.awsdns-10.net.
e2ma.net. 5 NS ns-1457.awsdns-54.org.
e2ma.net. 5 NS ns-1683.awsdns-18.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0