Paper rustle as sheet of paper or letter stuffed into envelope.
metallic mailbox outside, door shut
Putting a letter in a mail box
Apartment door mail slot open and slide mail through in the distance
Apartment door mail slot open and slide mail through
Sorting and shuffling paper envelopes. Vintage recording.
Mailbox - Open/Close, metal. Vintage recording.
Opening a metallic mail box to pick up the letters