It would be very useful to add word or phrase whitelist for empty system mail (e.g. "Champion 160 Reward") or empty player mail (e.g. "Tix,tickets,raffle,lottery,SpecificGuild,@dislikedPerson") so that Take All would *only* take empty mail matching those words.
This is in lieu of the MailR / Shissu's / GodSend bulk mail filter I wanted to implement, since I couldn't find a consistent way of identifying such messages.