mx2.zohocorp.com has no CNAME records.
Question and response
Question
dig mx2.zohocorp.com. NS
Answer
The response has no answer records.
Authority
zohocorp.com. 161 SOA ns1.zohocorp.com. dnsadmin.vtitan.com. 2026022303 7200 1800 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0