_spf-jamdc.sapjam.com has no CNAME records.
Question and response
Question
dig _spf-jamdc.sapjam.com. NS
Answer
The response has no answer records.
Authority
sapjam.com. 4850 SOA ns1.sap.net. dns.sap-ag.de. 1770814301 43200 1800 1814400 600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0