mail3.innovestsystems.com has no CNAME records.
Question and response
Question
dig mail3.innovestsystems.com. NS
Answer
The response has no answer records.
Authority
innovestsystems.com. 300 SOA sauthns2.qwest.net. abuse.centurylinkservices.net. 2260112088 10800 3600 604800 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0