Postal System
Learn everything you want about Postal System with the wikiHow Postal System Category. Learn about topics such as How to Address a Letter, How to Contact the United States Postal Service: Customer Support & More, How to Address to a PO Box, and more with our helpful step-by-step instructions with photos and videos.Featured Articles
Articles about Postal System
![](/images/thumb/4/4e/Address-a-Letter-Step-9-Version-3.jpg/-crop-375-300-375px-nowatermark-Address-a-Letter-Step-9-Version-3.jpg.webp)
How to
Address a Letter
Expert
![](/images/thumb/0/07/Address-to-a-Po-Box-Step-10.jpg/-crop-375-300-375px-nowatermark-Address-to-a-Po-Box-Step-10.jpg.webp)
How to
Address to a PO Box
Expert
![](/images/thumb/9/93/Mail-a-Postcard-Step-6-Version-3.jpg/-crop-375-300-375px-nowatermark-Mail-a-Postcard-Step-6-Version-3.jpg.webp)
How to
Mail a Postcard
Expert
![](/images/thumb/3/33/Pick-a-Mailbox-Lock-Step-8.jpg/-crop-375-300-375px-nowatermark-Pick-a-Mailbox-Lock-Step-8.jpg.webp)
How to
Pick a Mailbox Lock
Expert
![](/images/thumb/0/0d/Paint-a-Mailbox-Step-32.jpg/-crop-375-300-375px-nowatermark-Paint-a-Mailbox-Step-32.jpg.webp)
How to
Paint a Mailbox
Expert
![](/images/thumb/f/fe/Mail-a-Firearm-Step-21.jpg/-crop-375-300-375px-nowatermark-Mail-a-Firearm-Step-21.jpg.webp)
How to
Mail a Firearm
Expert