How to Delete Email Forwarders in Plesk 12.5?
To delete or remove the email forwarders follow the steps given below.
Step 1: Login to the Plesk control panel.
Step 2: Under Mail tab, select the mail account for which you want to stop the forwarders.
Step 3: Click Forwarding tab. Uncheck Switch on mail forwarding and click OK.
Mail forwarders for the respective email account will be removed as shown in the below image.