hel.GBlNET.net has no MX records.
Question and response
Question
dig hel.GBlNET.net. MX
Answer
The response has no answer records.
Authority
hel.GBlNET.net. 86400 SOA ns.GBlNET.net. vvv.GBlNET.net. 2023120801 10800 1200 1209600 259200
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0