alimail-access-agent-ay29.aliyun.com has no NS records.
NS records for this zone are defined at aliyun.com.
NS records for this zone are defined at aliyun.com.
Question and response
Question
dig alimail-access-agent-ay29.aliyun.com.gds.alibabadns.com. NS
Answer
The response has no answer records.
Authority
gds.alibabadns.com. 600 SOA gdsns1.alibabadns.com. none. 2018122017 1800 600 3600 360
Additional
. 0 OPT ; payload 1280, xrcode 0, version 0, flags 0