Question and response
Question
dig gmail-smtp-in.l.google.com. AAAA
Answer
gmail-smtp-in.l.google.com. 300 AAAA 2a00:1450:400c:c0d:0:0:0:1b
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 512, xrcode 0, version 0, flags 0