Question and response
Question
dig _spf1.gtnexus.com. TXT
Answer
_spf1.gtnexus.com. 60 TXT "v=spf1 include:spf.mandrillapp.com include:spf.protection.outlook.com include:mktomail.com include:amazonses.com a:smtp-d.inxsaas.com ip:52.34.166.7 ip:52.35.220.100 -all"
Authority
gtnexus.com. 86400 NS edns2.ultradns.biz.
gtnexus.com. 86400 NS edns2.ultradns.com.
gtnexus.com. 86400 NS edns2.ultradns.net.
gtnexus.com. 86400 NS edns2.ultradns.org.
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0