mail.jvmhost.com has no NS records.
NS records for this zone are defined at jvmhost.com.
NS records for this zone are defined at jvmhost.com.
Question and response
Question
dig mail.jvmhost.com. NS
Answer
The response has no answer records.
Authority
jvmhost.com. 1800 SOA algin.ns.cloudflare.com. dns.cloudflare.com. 2398001268 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0