prod-mail-relay-1.iad1.fsi.io.
Question and response
Question
dig 46.14.244.104.in-addr.arpa. PTR
Answer
46.14.244.104.in-addr.arpa. 86400 PTR prod-mail-relay-1.iad1.fsi.io.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1280, xrcode 0, version 0, flags 0