ns1.bvunet.net has no MX records.
Question and response
Question
dig ns1.bvunet.net. MX
Answer
The response has no answer records.
Authority
bvunet.net. 180 SOA ns20.digicertdns.com. dns.digicertdns.com. 2009010282 43200 3600 1209600 180
Additional
. 0 OPT ; payload 1280, xrcode 0, version 0, flags 0