depcmail.cscglobal.com has no CNAME records.
Question and response
Question
dig depcmail.cscglobal.com. NS
Answer
The response has no answer records.
Authority
cscglobal.com. 900 SOA udns1.cscudns.com. premiumdns.support.neustar. 2019112753 28800 900 1209600 900
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0