mx.aspmsg.net has no CNAME records.
Question and response
Question
dig mx.aspmsg.net. NS
Answer
The response has no answer records.
Authority
aspmsg.net. 878 SOA dnsa1.vodafone.net.tr. hostmaster.vodafone.net.tr. 2020012026 10800 3600 2419200 900
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0