How about a middle path, Cloudmark Desktop moving junk to the Spam folder and deleting it after you have not marked it good after some time?
Have Cloudmark Desktop Trim Your Spam Folder Automatically
To make Cloudmark Desktop permanently delete messages after a certain time in the Spam folder:
- Select Cloudmark | Options... from the Cloudmark Desktop toolbar.
- Go to the Preferences tab.
- Make sure Other actions: is selected under Detection Action.
- Select Move to Spam folder and delete permanently after 1 week or Move to Spam folder and delete permanently after 1 month from the Other actions: drop-down menu.
- Click OK.

