mail.hostchocolate.com has no CNAME records.
Question and response
Question
dig mail.hostchocolate.com. NS
Answer
The response has no answer records.
Authority
hostchocolate.com. 3326 SOA ns3.hostchocolate.com. hostmaster.hostchocolate.com. 2025112706 3600 3600 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0