ktw.gblnet.net has no MX records.
Question and response
Question
dig ktw.gblnet.net. MX
Answer
The response has no answer records.
Authority
ktw.gblnet.net. 86400 SOA ns.gblnet.net. vvv.gblnet.net. 2024091702 10800 1200 1209600 259200
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0