No, unfortunately – Site Builder operates on a separate server infrastructure to our standard Website Hosting.
Should you choose to move your Web Hosting to one of our Site Builder packages, your emails cannot be transferred and will need to be recreated (either by yourself or our Support Team).
We suggest that you back up of your current email accounts and if necessary send a list of your existing email accounts (e.g. EXAMPLE-yourname@yourdomain.co.za) to our Support Team on support@domains.co.za, and request this, so that we can get these setup for you asap.