cns3.godaddy.com has no MX records.
Question and response
Question
dig cns3.godaddy.com. MX
Answer
The response has no answer records.
Authority
godaddy.com. 3600 SOA cns1.godaddy.com. dns.jomax.net. 2026022010 300 600 1209600 3600
Additional
. 0 OPT ; payload 1280, xrcode 0, version 0, flags 0