Question and response
Question
dig relay.mail-forwarder.io. A
Answer
relay.mail-forwarder.io. 300 A 5.22.145.172
relay.mail-forwarder.io. 300 A 5.22.145.157
relay.mail-forwarder.io. 300 A 5.22.145.180
relay.mail-forwarder.io. 300 A 5.22.145.155
relay.mail-forwarder.io. 300 A 5.22.145.16
relay.mail-forwarder.io. 300 A 5.22.145.121
Authority
mail-forwarder.io. 172800 NS ns-1476.awsdns-56.org.
mail-forwarder.io. 172800 NS ns-1724.awsdns-23.co.uk.
mail-forwarder.io. 172800 NS ns-213.awsdns-26.com.
mail-forwarder.io. 172800 NS ns-590.awsdns-09.net.
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0