msg1.disney.com has no MX records.
Question and response
Question
dig msg1.disney.com. MX
Answer
The response has no answer records.
Authority
disney.com. 1800 SOA aa-eorcrp-dscsgm4-ns.disney.com. corp\.dns\.domains.disney.com. 2021046198 10800 3600 2419200 1800
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0