Question and response
Question
dig _netblocks.porcupine-mail.com. TXT
Answer
_netblocks.porcupine-mail.com. 7200 TXT "v=spf1 ip4:186.193.33.64/28 ip4:187.45.229.167/29 ip4:209.239.114.173/29 ip4:188.138.124.234/29 ip4:186.193.225.52/29 ip4:186.193.225.51/29 ip4:186.193.233.64/27 ip4:199.217.116.15 ip4:207.38.88.35 a:porcupine-mail.com a:mailcorp.com.br"
Authority
porcupine-mail.com. 172800 NS ns-1420.awsdns-49.org.
porcupine-mail.com. 172800 NS ns-1725.awsdns-23.co.uk.
porcupine-mail.com. 172800 NS ns-4.awsdns-00.com.
porcupine-mail.com. 172800 NS ns-824.awsdns-39.net.
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0