mx2.domainlocalhost.com has no NS records.
NS records for this zone are defined at domainlocalhost.com.
NS records for this zone are defined at domainlocalhost.com.
Question and response
Question
dig mx2.domainlocalhost.com. NS
Answer
The response has no answer records.
Authority
domainlocalhost.com. 3600 SOA ns1.mycloudmailbox.com. admin\@sherweb.com. 55587 1800 300 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0