Apex domains cannot have CNAME records.
Question and response
Question
dig click-send.net. NS
Answer
click-send.net. 5 NS ns-1594.awsdns-07.co.uk.
click-send.net. 5 NS ns-466.awsdns-58.com.
click-send.net. 5 NS ns-577.awsdns-08.net.
click-send.net. 5 NS ns-1138.awsdns-14.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0