appriver.com.2.0001.arsmtp.com has no AAAA records.
Question and response
Question
dig appriver.com.2.0001.arsmtp.com. AAAA
Answer
The response has no answer records.
Authority
0001.arsmtp.com. 600 SOA mdns1.appriver.com. support.appriver.com. 11127065 900 600 604800 600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0