ks.ks.wavewls.com has no MX records.
Question and response
Question
dig ks.ks.wavewls.com. MX
Answer
The response has no answer records.
Authority
wavewls.com. 3600 SOA ns0.wixdns.net. support.wix.com. 2017021725 10800 3600 1209600 3600
Additional
. 0 OPT ; payload 512, xrcode 0, version 0, flags 0