I've been wiping down my mail with rubbing alcohol to disinfect it. I heard someone suggest that money, mail, and other paper objects can be disinfected by placing them in an oven set at 165 F or higher. That seems to make sense. I also carry around an 8 ounce spray bottle with 70% alcohol to mist door knobs and such.
A simpler but slower approach I have been using: The bug can't live 24 hours on cardboard, I would assume it's the same for paper as cardboard is basically just heavy paper. Mail and packages get brought in to the garage and set down for 24 hours (or longer if there is any plastic involved as the bug can live 48 hours on plastic.) I then wash up.