ns4.mailkit.eu has no CNAME records.
Question and response
Question
dig ns4.mailkit.eu. NS
Answer
The response has no answer records.
Authority
mailkit.eu. 1868 SOA ns1.mailkit.eu. helpdesk.mailkit.eu. 2026030501 43200 7200 2419200 43200
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0