fiberspring.com has no MX records.
Question and response
Question
dig fiberspring.com. MX
Answer
The response has no answer records.
Authority
fiberspring.com. 600 SOA ns67.domaincontrol.com. dns.jomax.net. 2023032202 28800 7200 604800 600
Additional
. 0 OPT ; payload 1280, xrcode 0, version 0, flags 0