smtp1.sdf.xodiax.com has no NS records.
NS records for this zone are defined at sdf.xodiax.com.
NS records for this zone are defined at sdf.xodiax.com.
Question and response
Question
dig smtp1.sdf.xodiax.com. NS
Answer
The response has no answer records.
Authority
sdf.xodiax.com. 10800 SOA ns1.xodiax.com.sdf.xodiax.com. hostmaster.xodiax.com.sdf.xodiax.com. 2009042211 3600 900 1209600 10800
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0