ufa.GBlNET.net has no MX records.
Question and response
Question
dig ufa.GBlNET.net. MX
Answer
The response has no answer records.
Authority
ufa.GBlNET.net. 86400 SOA ns.gblnet.ru. vvv.gblnet.ru. 2023032402 10800 1200 1209600 259200
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0