mx1.mediainvent.com has no CNAME records.
Question and response
Question
dig mx1.mediainvent.com. NS
Answer
The response has no answer records.
Authority
mediainvent.com. 253 SOA hosting.mediainvent.com. noc.mediainvent.com. 2025070902 10800 3600 604800 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0