_spf.brdrive.net has no CNAME records.
Question and response
Question
dig _spf.brdrive.net. NS
Answer
The response has no answer records.
Authority
brdrive.net. 654 SOA ns4.brdrive.net. suporte.brdrive.net. 2026021600 3600 900 604800 900
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0