Out going mail

I am a renter... I am a renter of a lovely shoebox home I am lucky to be able to rent from my brother in law. My brother in law has his business mail coming to our address and it quickly gets mixed up into our mail. I worked on organizing our mail/bills in an accordion file so I needed a quick place to put his. My goal was not to have it pile up on my table or other flat surfaces... Then the idea popped in my head! I attached them to the wall! I used two command strip 'hooks' side by side measured to fit the smallest mailing envelope I had on hand. I have enough room from room to fit 5 letters. I placed these right on the wall next to the door so we can pick them up on our way out!