Question and response
Question
dig m1.cartstack.com. TXT
Answer
m1.cartstack.com. 3600 TXT "v=spf1 include:mailgun.org ~all"
Authority
cartstack.com. 172800 NS ns-1175.awsdns-18.org.
cartstack.com. 172800 NS ns-1538.awsdns-00.co.uk.
cartstack.com. 172800 NS ns-301.awsdns-37.com.
cartstack.com. 172800 NS ns-617.awsdns-13.net.
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0