smtp.anlai.com has no NS records.
NS records for this zone are defined at anlai.com.
NS records for this zone are defined at anlai.com.
Question and response
Question
dig smtp.anlai.com. NS
Answer
The response has no answer records.
Authority
anlai.com. 600 SOA dns29.hichina.com. hostmaster.hichina.com. 2026011209 3600 1200 86400 600
Additional
. 0 OPT ; payload 1280, xrcode 0, version 0, flags 0