ns2.bluecatdns.com has no MX records.
Question and response
Question
dig ns2.bluecatdns.com. MX
Answer
The response has no answer records.
Authority
bluecatdns.com. 600 SOA ns25.domaincontrol.com. dns.jomax.net. 2023092000 28800 7200 604800 600
Additional
. 0 OPT ; payload 1280, xrcode 0, version 0, flags 0