ns3.afoyi.com has no MX records.
Question and response
Question
dig ns3.afoyi.com. MX
Answer
The response has no answer records.
Authority
afoyi.com. 3600 SOA ns1.afoyi.com. root.afoyi.com. 1772028076 10800 900 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0