mta01-relay.cloud-preview.vadesecure.com.
Question and response
Question
dig 175.160-27.30.4.62.in-addr.arpa. PTR
Answer
175.160-27.30.4.62.in-addr.arpa. 300 PTR mta01-relay.cloud-preview.vadesecure.com.
Authority
160-27.30.4.62.in-addr.arpa. 172800 NS ns-1048.awsdns-03.org.
160-27.30.4.62.in-addr.arpa. 172800 NS ns-1835.awsdns-37.co.uk.
160-27.30.4.62.in-addr.arpa. 172800 NS ns-54.awsdns-06.com.
160-27.30.4.62.in-addr.arpa. 172800 NS ns-778.awsdns-33.net.
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0