mail.gestiondeservidor.com has no NS records.
NS records for this zone are defined at gestiondeservidor.com.
NS records for this zone are defined at gestiondeservidor.com.
Question and response
Question
dig mail.gestiondeservidor.com. NS
Answer
The response has no answer records.
Authority
gestiondeservidor.com. 1800 SOA fay.ns.cloudflare.com. dns.cloudflare.com. 2397409762 10000 2400 604800 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0