ns4.turnkeydns.com has no MX records.
Question and response
Question
dig ns4.turnkeydns.com. MX
Answer
The response has no answer records.
Authority
turnkeydns.com. 10800 SOA ns1.turnkeydns.com. dns.as40244.net. 2026022204 3600 1800 1209600 10800
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0