As a variation on this theme, each day I manually activate a macro that selects all items in the inbox and drag them to the desktop, then switches back to Mail to delete the just copied to the Desktop contents.
If Mail's AppleScripts triggering is unreliable could KM monitor some system level notification of arriving mail and give me the option to move it to the desktop or just move it if I've not been active for X period of time?
Thank you.