mx2.niif.hu has no CNAME records.
Question and response
Question
dig mx2.niif.hu. NS
Answer
The response has no answer records.
Authority
niif.hu. 3600 SOA ns2.iif.hu. hostmaster.iif.hu. 2026030501 43200 7200 172800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0