cookinguniversity.com has no MX records.
Question and response
Question
dig cookinguniversity.com. MX
Answer
The response has no answer records.
Authority
cookinguniversity.com. 900 SOA mgoextdns1.genmills.com. dom\.admin.genmills.com. 19 10800 3600 2419200 900
Additional
. 0 OPT ; payload 1220, xrcode 0, version 0, flags 0