Question and response
Question
dig spf-b.authsmtp.com. TXT
Answer
spf-b.authsmtp.com. 14400 TXT "v=spf1 ip4:72.52.72.32/28 ip4:64.71.149.160/28 -all"
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1400, xrcode 0, version 0, flags 0