_spf.openbusiness.com has no CNAME records.
Question and response
Question
dig _spf.openbusiness.com. NS
Answer
The response has no answer records.
Authority
openbusiness.com. 5512 SOA ns1.swisslink.ch. dnsmaster.swisslink.ch. 2025121902 86400 7200 3600000 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0