9.73.58.185.as201563.net has no MX records.
Question and response
Question
dig 9.73.58.185.as201563.net. MX
Answer
The response has no answer records.
Authority
as201563.net. 86400 SOA dns1.avalon.hr. root.avalon.hr. 2026020501 3600 1800 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0