Can you put any package into a drop off slot as long as it fits?

Can you put any package into a drop off slot as long as it fits? mail slot drop box mail Soon after, the couple attached a second box solely for the alien-seekers It has a mail slot and is labeled ALIEN on one side and DROP BOX on another mail slot catcher Looking for mail drop slot online in India? Shop for the best mail drop slot from our collection of exclusive, customized & handmade products

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mail box slot This through the wall mail slot is designed to accept standard mail, rent payments, or small parcels It can be used as a payment drop slot for rental offices Door Drop Box for Mail, Rent, Deposit, and Night Key