How to set up email forwarding in Plesk?
To set up email forwarding go to Mail tab and select email addresses. There you can see four tabs General, Forwarding, Email Aliases and Auto-Reply. Select forwarding tab and then select the checkbox of Switch on mail forwarding.
In the rectangle box below type in the email addresses to which you want the mails to be forwarded. You can type one or more email addresses as required. Click OK to complete.