hs2-22434931._domainkey.yotta.com has no NS records.
NS records for this zone are defined at yotta.com.
NS records for this zone are defined at yotta.com.
Question and response
Question
dig yotta-com.hs18b.dkim.hubspotemail.net. NS
Answer
The response has no answer records.
Authority
hubspotemail.net. 1800 SOA jerry.ns.cloudflare.com. dns.cloudflare.com. 2400315853 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0