Question and response
Question
dig u2721515.wl016.sendgrid.net. TXT
Answer
u2721515.wl016.sendgrid.net. 1800 TXT "v=spf1 ip4:149.72.128.37 -all"
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0