How do you mail a letter when you just have a mail slot?

How do you mail a letter when you just have a mail slot? mail slot A slot on the front of each magazine can be setup as a mailslot This allows a tape cartridge to be inserted or ejected from the library while the mail slot dimensions This Large Mail Slot with Interior Frame features a spring-loaded flap that opens outside, with an accompanying brass frame on the interior side

mail slot dimensions The size of your installed mail slot should be large enough to accommodate large envelopes, magazine subscriptions, or small parcels, and

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