To create the domain's own emails, the first thing to do is go to the control panel at midominio.com/cpanel, replacing "mydomain.com" with the address of your website.
- Email.
- Email accounts.
- Add email account.
- Domain: here we select the domain to which the email account will be created
- Mailbox fee if you want the mailbox to have a specific size or Unlimited if you want it to be filled with the size of the service.
For better help, you can watch the following video: