cloud.zayo.com has no MX records.
Question and response
Question
dig cloud.zayo.com. MX
Answer
The response has no answer records.
Authority
cloud.zayo.com. 3600 SOA ns.zayo.com. nopss.zayo.us. 2025082102 14400 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0