Question and response
Question
dig pdx-out-011.esa.us-west-2.outbound.mail-perimeter.amazon.com. A
Answer
pdx-out-011.esa.us-west-2.outbound.mail-perimeter.amazon.com. 1800 A 52.35.192.45
Authority
us-west-2.outbound.mail-perimeter.amazon.com. 172800 NS ns-1406.awsdns-47.org.
us-west-2.outbound.mail-perimeter.amazon.com. 172800 NS ns-2009.awsdns-59.co.uk.
us-west-2.outbound.mail-perimeter.amazon.com. 172800 NS ns-252.awsdns-31.com.
us-west-2.outbound.mail-perimeter.amazon.com. 172800 NS ns-904.awsdns-49.net.
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0