Question and response
Question
dig spf4.expertsender.com. TXT
Answer
spf4.expertsender.com. 3600 TXT "v=spf1 ip4:176.126.248.26/28 ip4:193.106.104.230/28 -all"
Authority
expertsender.com. 3600 NS pdns08.domaincontrol.com.
expertsender.com. 3600 NS pdns07.domaincontrol.com.
Additional
. 0 OPT ; payload 1280, xrcode 0, version 0, flags 0