mx.cki.net has no CNAME records.
Question and response
Question
dig mx.cki.net. NS
Answer
The response has no answer records.
Authority
cki.net. 105 SOA dns.starpoint.net. hostmaster.starpoint.net. 2025111111 300 300 300 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0