I am trying to use WIX as my domain holder but want X-5 to host

I am trying to configure my domain using the DNS records provided by x-5.  The five Type A records are fine as well as the TXT record.   But after multiple attempts with the MX value when I push the conformation button the red circle with red exclamation point comes up by the MX value.

I don't even use this site for email,

Please help,

Michael Curley