Question and response
Question
dig _spf.optimalblue.com. TXT
Answer
_spf.optimalblue.com. 3600 TXT "v=spf1 ip4:52.249.26.214/32 ip4:52.252.165.197/32 ip4:52.252.212.226/32 ip4:52.249.26.186/32 ip4:20.98.40.154/32 ip4:20.80.52.0/32 ip4:206.201.77.127/32 ip4:20.98.42.92 ip4:20.80.6.91 ip4:20.94.186.35 ip4:20.88.194.46 " "ip4:23.100.237.65/32 ip4:23.100.236.102/32 -all"
Authority
optimalblue.com. 172800 NS ns-1288.awsdns-33.org.
optimalblue.com. 172800 NS ns-1854.awsdns-39.co.uk.
optimalblue.com. 172800 NS ns-532.awsdns-02.net.
optimalblue.com. 172800 NS ns-79.awsdns-09.com.
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0