Question and response
Question
dig c1f2.porcupine-mail.com. TXT
Answer
c1f2.porcupine-mail.com. 86400 TXT "v=spf1 include:_c1_netblocks.porcupine-mail.com ptr -all"
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