wixsite.com has no MX records.
Question and response
Question
dig wixsite.com. MX
Answer
The response has no answer records.
Authority
wixsite.com. 3600 SOA dns1.p07.nsone.net. hostmaster.nsone.net. 1749718617 3600 600 604800 3600
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0