ns1.vistec.net has no MX records.
Question and response
Question
dig ns1.vistec.net. MX
Answer
The response has no answer records.
Authority
vistec.net. 120 SOA ns.vistec.com. root.ns.vistec.com. 2026020401 7200 7200 1209600 120
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0