ns3.as45302.net has no MX records.
Question and response
Question
dig ns3.as45302.net. MX
Answer
The response has no answer records.
Authority
as45302.net. 60 SOA ns1.systemdns.com. hostmaster.systemdns.com. 1751983041 10800 3600 300 60
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0