Nano Servers Inc

Go to the Mail section of your Plesk Control Panel and click Add New Mail Account.
Your domain name is shown to the right of the @ sign, so you only need to specify the desired name for the mailbox. This can be, for example, your first name and last name separated by a dot, a department name, or any other text in Latin symbols. The name should be short enough to remember. It can be comprised of numbers, letters, dashes, dots and underscore symbols as well.
Specify a password that you will use for accessing your mailbox.
Make sure that a check mark is present in the Mailbox check box.
Click OK.

How do I add an email account in Parallels Plesk?