2-mia.planisys.net has no MX records.
Question and response
Question
dig 2-mia.planisys.net. MX
Answer
The response has no answer records.
Authority
planisys.net. 60 SOA dns1.planisys.net. admin.planisys.net. 2021084988 3600 600 1209600 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0