Your domain will be using the nameservers of WIX. The MX Record is setup up in your WIX dashboard.
- Click here to sign in to your Wix account.
- Hover over the user panel at the top right and click Domains.
- Click the expand arrow next to the relevant domain.
- Click the Mailboxes tab.
- Click Configure your MX records.
- Click the drop-down menu under Your Email Provider.
- Select a provider from the list: Other
- Enter the MX record under Points to and Click OK. (inquire with our Technical Support of your hosting's MX Record if you don't know it yet)
o Original article is from the website of WIX: https://support.wix.com/en/article/tutorial-managing-your-mx-records