mail.nexxera.com has no NS records.
NS records for this zone are defined at nexxera.com.
NS records for this zone are defined at nexxera.com.
Question and response
Question
dig mail.nexxera.com. NS
Answer
The response has no answer records.
Authority
nexxera.com. 600 SOA ns003.nexxera.com.br. hostmaster.nexxera.com. 2026031101 7200 900 1209600 600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0