Question and response
Question
dig smtp03.eu-central-1.mail-perimeter.amazon.com. A
Answer
smtp03.eu-central-1.mail-perimeter.amazon.com. 1800 A 18.156.100.220
Authority
eu-central-1.mail-perimeter.amazon.com. 172800 NS ns-117.awsdns-14.com.
eu-central-1.mail-perimeter.amazon.com. 172800 NS ns-1212.awsdns-23.org.
eu-central-1.mail-perimeter.amazon.com. 172800 NS ns-1802.awsdns-33.co.uk.
eu-central-1.mail-perimeter.amazon.com. 172800 NS ns-518.awsdns-00.net.
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0