Question and response
Question
dig _mta-relay.serverlet.com. TXT
Answer
_mta-relay.serverlet.com. 3600 TXT "v=spf1 ip4:185.169.24.51 ip4:185.169.25.28 ip4:185.169.25.31 ip4:185.169.25.237 ~all"
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0