ns4.lidnet.net has no MX records.
Question and response
Question
dig ns4.lidnet.net. MX
Answer
The response has no answer records.
Authority
lidnet.net. 3600 SOA ns.lidnet.net. hostmaster.lidnet.net. 2026021203 900 7200 2419200 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0