fra.gblnet.net has no MX records.
Question and response
Question
dig fra.gblnet.net. MX
Answer
The response has no answer records.
Authority
fra.gblnet.net. 86400 SOA ns.gblnet.net. vvv.gblnet.net. 2025070701 10800 1200 1209600 259200
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0