mail2.jobdivamail.com has no CNAME records.
Question and response
Question
dig mail2.jobdivamail.com. NS
Answer
The response has no answer records.
Authority
jobdivamail.com. 7053 SOA ns1.he.net. hostmaster.he.net. 2025101000 10800 1800 604800 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0