Question and response
Question
dig spf-77b.mailgrid.net.br. TXT
Answer
spf-77b.mailgrid.net.br. 300 TXT "v=spf1 ip4:177.71.161.242 ip4:52.73.23.11 -all"
Authority
mailgrid.net.br. 172800 NS ns-1289.awsdns-33.org.
mailgrid.net.br. 172800 NS ns-1608.awsdns-09.co.uk.
mailgrid.net.br. 172800 NS ns-437.awsdns-54.com.
mailgrid.net.br. 172800 NS ns-945.awsdns-54.net.
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0