Question and response
Question
dig postfix.har.com. MX
Answer
postfix.har.com. 300 MX 10 postfix.har.com.
Authority
har.com. 3600 NS ns-1380.awsdns-44.org.
har.com. 3600 NS ns-1987.awsdns-56.co.uk.
har.com. 3600 NS ns-229.awsdns-28.com.
har.com. 3600 NS ns-612.awsdns-12.net.
Additional
postfix.har.com. 300 A 107.23.206.229
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0