Question and response
Question
dig _spf.usp.br. TXT
Answer
_spf.usp.br. 1800 TXT "v=spf1 include:_email.usp.br include:_spf.google.com ip4:200.144.240.0/20 -all"
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0