zip.zayo.com has no MX records.
Question and response
Question
dig zip.zayo.com. MX
Answer
The response has no answer records.
Authority
zip.zayo.com. 3600 SOA ns.zayo.com. nopss.zayo.us. 2026022001 14400 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0