mx.naracom.hu has no CNAME records.
Question and response
Question
dig mx.naracom.hu. NS
Answer
The response has no answer records.
Authority
naracom.hu. 158 SOA nns1.datof.com. hostmaster.naracom.hu. 2026022883 28800 7200 3600000 21600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0