smtp01.wmfi.net has no NS records.
NS records for this zone are defined at wmfi.net.
NS records for this zone are defined at wmfi.net.
Question and response
Question
dig smtp01.wmfi.net. NS
Answer
The response has no answer records.
Authority
wmfi.net. 600 SOA ns.cgi.com. dnsops\.gto.cgi.com. 792284415 1200 180 1209600 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0