Question and response
Question
dig inbound-smtp.us-east-1.amazonaws.com. A
Answer
inbound-smtp.us-east-1.amazonaws.com. 60 A 54.164.173.191
inbound-smtp.us-east-1.amazonaws.com. 60 A 3.211.210.226
inbound-smtp.us-east-1.amazonaws.com. 60 A 44.210.166.32
inbound-smtp.us-east-1.amazonaws.com. 60 A 44.206.9.87
inbound-smtp.us-east-1.amazonaws.com. 60 A 54.197.5.236
Authority
inbound-smtp.us-east-1.amazonaws.com. 172800 NS ns-1450.awsdns-53.org.
inbound-smtp.us-east-1.amazonaws.com. 172800 NS ns-152.awsdns-19.com.
inbound-smtp.us-east-1.amazonaws.com. 172800 NS ns-1827.awsdns-36.co.uk.
inbound-smtp.us-east-1.amazonaws.com. 172800 NS ns-778.awsdns-33.net.
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0