email3.cdsfulfillment.com has no CNAME records.
Question and response
Question
dig email3.cdsfulfillment.com. NS
Answer
The response has no answer records.
Authority
cdsfulfillment.com. 4067 SOA pdns67.ultradns.com. hostmaster.cds-global.com. 2012073307 3600 600 1209600 10800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0