mx1.cesactivationprod.iphmx.COM has no CNAME records.
Question and response
Question
dig mx1.cesactivationprod.iphmx.COM. NS
Answer
The response has no answer records.
Authority
iphmx.COM. 3534 SOA ns1-93.akam.net. stbu-hostmaster\@cisco.COM. 1771858650 3600 900 2419200 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0