nova53.org has no MX records.
Question and response
Question
dig nova53.org. MX
Answer
The response has no answer records.
Authority
nova53.org. 3600 SOA ORION.NS.NOVA53.NET. SOA.NOVA53.NET. 2022121402 10800 3600 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0