ns1.waveip.org has no MX records.
Question and response
Question
dig ns1.waveip.org. MX
Answer
The response has no answer records.
Authority
waveip.org. 300 SOA ns1.wavedns.net. dnsadmin.wavebroadband.com. 2026020900 3600 600 3600000 300
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0