Clearly what needs to happen is for congress to suspend all physical mail delivery ... why they didn't come to this conclusion sooner is beyond me.
http://www.foxnews.com/story/0,2933,110270,00.html
Several congresscritters have actually become more responsive to emails than they were in the past. Conventional wisdom used to say that email never got read ... that, of course, was before the first anthrax attacks.
What this is all likely to come down to is some lower level functionary in a biohazard suit opening and making electronic copies of all mail coming into the congressional post office, then dropping the originals directly into an incinerator.