Question and response
Question
dig _spf.nimta.com. TXT
Answer
_spf.nimta.com. 300 TXT "v=spf1 ip4:77.66.39.128/25 include:sendgrid.net ~all"
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0