_spf.criaenvio.com has no CNAME records.
Question and response
Question
dig _spf.criaenvio.com. NS
Answer
The response has no answer records.
Authority
criaenvio.com. 3600 SOA ns57.domaincontrol.com. dns.jomax.net. 2025101600 28800 7200 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0