mail1.ccsend.com has no CNAME records.
Question and response
Question
dig mail1.ccsend.com. NS
Answer
The response has no answer records.
Authority
ccsend.com. 1748 SOA ns4.ccsend.com. hostmaster.ccsend.com. 1771758308 16384 2048 1048576 2560
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0