How to Configure Email Forwarding in Plesk? By admin | August 1, 2017 0 Comment 1.Click on the Mail tab. 2.Select an e-mail address. 3.Click on the Forwarding tab. 4.Click on the “Switch on mail forwarding” if it is not switched on already. 5.Type in an e-mail address you want to forward e-mails to. 6.Click the OK button.