imap.machinesgadgets.com has no NS records.
NS records for this zone are defined at machinesgadgets.com.
NS records for this zone are defined at machinesgadgets.com.
Question and response
Question
dig imap.machinesgadgets.com. NS
Answer
The response has no answer records.
Authority
machinesgadgets.com. 3601 SOA dns1.registrar-servers.com. hostmaster.registrar-servers.com. 1757614553 43200 3600 604800 3601
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0