Apex domains cannot have CNAME records.
Question and response
Question
dig qboxmail.com. NS
Answer
qboxmail.com. 1 NS dns200.anycast.me.
qboxmail.com. 1 NS ns200.anycast.me.
Authority
The response has no authority records.
Additional
ns200.anycast.me. 1 A 46.105.207.200
dns200.anycast.me. 1 A 46.105.206.200
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0