Question and response
Question
dig spgo.io. MX
Answer
spgo.io. 300 MX 5 smtp.sparkpostmail.com.
Authority
spgo.io. 172800 NS ns-1380.awsdns-44.org.
spgo.io. 172800 NS ns-1748.awsdns-26.co.uk.
spgo.io. 172800 NS ns-277.awsdns-34.com.
spgo.io. 172800 NS ns-678.awsdns-20.net.
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0