ttc.finaltek.net has no MX records.
Question and response
Question
dig ttc.finaltek.net. MX
Answer
The response has no answer records.
Authority
finaltek.net. 1800 SOA ns.gransy.com. root.gransy.com. 2771766257 86400 900 1209600 1800
ttc.finaltek.net. 1800 NSEC vpn.finaltek.net. A AAAA RRSIG NSEC
Additional
. 0 OPT ; payload 1280, xrcode 0, version 0, flags 0