175.103.153.190.net-uno.net has no MX records.
Question and response
Question
dig 175.103.153.190.net-uno.net. MX
Answer
The response has no answer records.
Authority
net-uno.net. 43200 SOA n1.net-uno.net. root.net-uno.net. 2026020402 14400 3600 1209600 86400
Additional
. 0 OPT ; payload 512, xrcode 0, version 0, flags 0