Question and response
Question
dig spf.c5mail.net. TXT
Answer
spf.c5mail.net. 3600 TXT "v=spf1 include:_spf.c5mail.net ?all"
Authority
c5mail.net. 172800 NS ns-1216.awsdns-24.org.
c5mail.net. 172800 NS ns-1825.awsdns-36.co.uk.
c5mail.net. 172800 NS ns-326.awsdns-40.com.
c5mail.net. 172800 NS ns-836.awsdns-40.net.
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0