In the United States, residential mailbox size and location of the box or mail slot is regulated by the United States Postal Service (USPS). Curbside mailboxes can be colorful and customized within those guidelines, but a locking box is recommended. New developments, however, generally have a centralized mailbox location with a bank of locking boxes and these cannot be customized in any way.
By law, only a USPS mail carrier is allowed to place anything in the mailbox, with the exception of outgoing mail to be picked up by the mail carrier. In curbside mailboxes, a red flag is raised on the box when there is mail for pickup. Centralized mailboxes do not have a pickup location and homeowners who have these must use another method for outgoing mail.
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 Vintage Rustic Metal Mailbox  US $.99
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 Mail Box Decor BILL DETOUR Stickers Set of 2 US $3.75
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 Deluxe Black Plastic Standard Mailbox Solar Group Inc US $12.00
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 ANTIQUE STYLE LETTER BOX Cast Iron Mail Mailbox NICE US $8.99
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 Custom Firefighter Fire Department Engine Truck Mailbox US $99.95
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 BRONZE ALUMINUM WALL MOUNT MAILBOX IVY DESIGN NIB US $91.29
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 Antique Cast Iron Mail Box w Rare Mispelled Word US $103.50
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 custom MAILBOX NUMBERS Reflective vinyl Decal Sticker US $4.99
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 GhostRider Skelleton Mailbox Handpainted Only 1 Must C US $29.00
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 Vintage METAL MAILBOX w Newspaper Holder Cottage Chic US $18.99
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 MASSEY FERGUSON MAILBOX US $50.00
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 LARGE BLACK 22 MAILBOX US $15.00
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 3 inch peel and stick numbers for a mailbox or house US $.25
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 Barcelona Mailbox with Flip Up Flag Brown US $275.00
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 Mailbox T1 White Heavy Duty Powder Coat US $.99
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 Mailbox Vintage Cast Metal Lockable Nice Original Shape US $3.99
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