zimbra.hegerys.com has no NS records.
NS records for this zone are defined at hegerys.com.
NS records for this zone are defined at hegerys.com.
Question and response
Question
dig zimbra.hegerys.com. NS
Answer
The response has no answer records.
Authority
hegerys.com. 86400 SOA ns.magic.fr. hostmaster.magic.fr. 2019102000 22000 3600 604800 86400
Additional
. 0 OPT ; payload 4096, xrcode 0, version 0, flags 0