The best option is to get all of your correspondence by Internet and that's basically free. I have also used a virtual mailbox for about $10 per month. With one of those you change your address to their mailbox, they receive your letters, they scan the envelope and you can see it online, then you tell them if you want them to open it and scan it online where you can see it (which is no extra charge) or you can forward it to where you are for a few dollars extra.