Question and response
Question
dig inbound-smtp.us-west-2.amazonaws.com. A
Answer
inbound-smtp.us-west-2.amazonaws.com. 60 A 54.188.121.70
inbound-smtp.us-west-2.amazonaws.com. 60 A 35.161.157.106
inbound-smtp.us-west-2.amazonaws.com. 60 A 52.13.163.116
inbound-smtp.us-west-2.amazonaws.com. 60 A 52.43.162.244
Authority
inbound-smtp.us-west-2.amazonaws.com. 172800 NS ns-1152.awsdns-16.org.
inbound-smtp.us-west-2.amazonaws.com. 172800 NS ns-1635.awsdns-12.co.uk.
inbound-smtp.us-west-2.amazonaws.com. 172800 NS ns-453.awsdns-56.com.
inbound-smtp.us-west-2.amazonaws.com. 172800 NS ns-585.awsdns-09.net.
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0