dns-master.atlanticbb.net has no MX records.
Question and response
Question
dig dns-master.atlanticbb.net. MX
Answer
The response has no answer records.
Authority
atlanticbb.net. 1800 SOA dns-master.atlanticbb.net. netdnsadmin.atlanticbb.net. 2025121601 1800 900 3600000 1800
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0