vpn.ro.gtsce.net has no MX records.
Question and response
Question
dig vpn.ro.gtsce.net. MX
Answer
The response has no answer records.
Authority
ro.gtsce.net. 300 SOA ns.gtstelecom.ro. hostmaster.gtstelecom.ro. 2026021801 28800 7200 1814400 300
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0