Question and response
Question
dig mx.inbound.elasticemail.com. A
Answer
mx.inbound.elasticemail.com. 3600 A 91.121.50.99
Authority
elasticemail.com. 172800 NS ns-1228.awsdns-25.org.
elasticemail.com. 172800 NS ns-1687.awsdns-18.co.uk.
elasticemail.com. 172800 NS ns-270.awsdns-33.com.
elasticemail.com. 172800 NS ns-776.awsdns-33.net.
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0