mx-i.invitel.net has no CNAME records.
Question and response
Question
dig mx-i.invitel.net. NS
Answer
The response has no answer records.
Authority
invitel.net. 564 SOA ns1.hdsnet.hu. dnsadmin.digi.hu. 2022120301 21600 7200 604800 7200
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0