mrl.itdnet.net has no MX records.
Question and response
Question
dig mrl.itdnet.net. MX
Answer
The response has no answer records.
Authority
ITDNet.net. 86400 SOA ns.ITDNet.net. nmc.ITDNet.net. 2024090101 28800 7200 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0