fe.direcnode.com has no MX records.
Question and response
Question
dig fe.direcnode.com. MX
Answer
The response has no answer records.
Authority
direcnode.com. 1800 SOA jean.ns.cloudflare.com. dns.cloudflare.com. 2396587862 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0