server-relay-1.tetrain.com has no MX records.
Question and response
Question
dig server-relay-1.tetrain.com. MX
Answer
The response has no answer records.
Authority
tetrain.com. 600 SOA ns39.domaincontrol.com. dns.jomax.net. 2026011300 28800 7200 604800 600
Additional
. 0 OPT ; payload 1280, xrcode 0, version 0, flags 0