dkim.autotask.net has no NS records.
NS records for this zone are defined at autotask.net.
NS records for this zone are defined at autotask.net.
Question and response
Question
dig dkim.autotask.net. NS
Answer
The response has no answer records.
Authority
autotask.net. 180 SOA ns1.autotask.com. tharris.autotask.com. 2008011913 43200 3600 1209600 180
Additional
. 0 OPT ; payload 1280, xrcode 0, version 0, flags 0