200._domainkey.dkim2.ccsend.com has no MX records.
Question and response
Question
dig 200._domainkey.dkim2.ccsend.com. MX
Answer
The response has no answer records.
Authority
ccsend.com. 2560 SOA ns4.ccsend.com. hostmaster.ccsend.com. 1771950908 16384 2048 1048576 2560
Additional
. 0 OPT ; payload 1680, xrcode 0, version 0, flags 0