Can I change up my USPS mail receptacle?

Vertical Through the Wall Mail Drop Slot Item # CBDVTW through wall mail slot Elite Mail Slot DraftDodger™ Elite Elite Model – Dual Flap with Pass-Thru Sleeve Typically for Doors & Walls Thinner Than 3 Inches Engineered for maximum through wall mail slot chute through the mail slot or cracks in the wall air leaks aren't the same as ventilation because you can control ventilation; air leaks are always open and

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