ns10.localdns.com has no MX records.
Question and response
Question
dig ns10.localdns.com. MX
Answer
The response has no answer records.
Authority
localdns.com. 1800 SOA ian.ns.cloudflare.com. dns.cloudflare.com. 2397284137 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0