iredmail.server.cloud.do has no NS records.
NS records for this zone are defined at server.cloud.do.
NS records for this zone are defined at server.cloud.do.
Question and response
Question
dig iredmail.server.cloud.do. NS
Answer
The response has no answer records.
Authority
server.cloud.do. 3600 SOA ue.dnsdocloud.com. comercial.kaos.es. 2026012102 10800 3600 604800 10800
Additional
. 0 OPT ; payload 1680, xrcode 0, version 0, flags 0