I use a service called physicaladdress.com They provide an actual address, and then before you move you submit a post office change of address to that address. When new mail comes in they scan the outside of the envelope and send an email to me. If I want I can then have them open and scan the contents and send that pdf to me. Then I can have them either trash it, save it, or forward it to another address (would be either my son or my accountant). Has worked great for me.