relay-internal.lidnet.net has no MX records.
Question and response
Question
dig relay-internal.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