Interesting concept. What they do is instead of receiving actual physical mails, you get digital copies instead. So you sign up for this free service and receive a "Zumbox" and if the company or business supports this service as well, you will receive digital copies instead. Although it is a good idea and can save a paper and postage costs, there is still a big problem. Most companies and businesses do not support this. Furthermore, won't it be easier to just provide an email address to the company for them to send the digital mails to you directly? Yes, it is slightly more secure but if you are careful about the email address, it shouldn't be a problem. And I really doubt that any company or business will send important letters or documents digitally anyway.