Assuming you have a suitable All Secure Domains subscription active for your domain you can use the
following process to create a new mailbox via the control panel.
Login to your All Secure Domains control panel
Select Email Management for the domain you're adding the mailbox to
Click the "+" button at the top of the mailboxes list. If not mailboxes currently exist, the "+" button will be visible without the list below.
Enter your desired mailbox name - the part of the email address before the "@" symbol, and the mailbox password.
Click "Save" to complete the process.
Your new mailbox may take up to 30 minutes to become available (although it's normally ready in less than 10 minutes).