_spf.workspace.org has no CNAME records.
Question and response
Question
dig _spf.workspace.org. NS
Answer
The response has no answer records.
Authority
workspace.org. 10800 SOA ns1.private-nameserver.net. admin.workspace.org. 2025112903 3600 1800 1209600 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0