correo2.iservicesmail.com has no NS records.
NS records for this zone are defined at iservicesmail.com.
NS records for this zone are defined at iservicesmail.com.
Question and response
Question
dig correo2.iservicesmail.com. NS
Answer
The response has no answer records.
Authority
iservicesmail.com. 86400 SOA ns1.comunitel.net. hostmaster.comunitel.net. 2023122100 86400 7200 3600000 86400
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0