mx.brixonelta.com has no NS records.
NS records for this zone are defined at brixonelta.com.
NS records for this zone are defined at brixonelta.com.
Question and response
Question
dig mx.brixonelta.com. NS
Answer
The response has no answer records.
Authority
brixonelta.com. 3600 SOA dns.brixonelta.com. hostmaster.brixonelta.com. 1191291554 43200 3600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0