To customize Email Clients, click Customize button under clients list as shown on picture below:

You will see the mail clients manager window:

To add new email client:
1. Click New button
2. Enter Name
3. Enter Command Line for Email Client or alternatively click Point to File button to select file using Open dialog
4 . Click Apply button

Note:
- Click Delete button to delete selected client
- Click Reset button to cancel any unwanted changes
- Click Close button to close this window

ADD/EDIT EMAIL ACCOUNTS - HOME - ADD/EDIT AUTO-SELECTION RULES