Question and response
Question
dig spf.crsend.com. TXT
Answer
spf.crsend.com. 300 TXT "v=spf1 ip4:178.77.121.128/26 ip4:158.69.163.48/29 ip4:46.4.238.128/29 ip4:194.42.96.0/23 ip6:2607:5300:203:fe1::/112 ~all"
Authority
crsend.com. 172800 NS ns-1148.awsdns-15.org.
crsend.com. 172800 NS ns-1578.awsdns-05.co.uk.
crsend.com. 172800 NS ns-214.awsdns-26.com.
crsend.com. 172800 NS ns-803.awsdns-36.net.
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0