reverse-grl284771069.rdns.jetsmtp.net has no AAAA records.
Question and response
Question
dig reverse-grl284771069.rdns.jetsmtp.net. AAAA
Answer
The response has no answer records.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0