mail.commpartners.com has no NS records.
NS records for this zone are defined at commpartners.com.
NS records for this zone are defined at commpartners.com.
Question and response
Question
dig mail.commpartners.com. NS
Answer
The response has no answer records.
Authority
commpartners.com. 180 SOA ns10.digicertdns.com. dns.digicertdns.com. 2009010297 43200 3600 1209600 180
Additional
. 0 OPT ; payload 1280, xrcode 0, version 0, flags 0