Know What You’re Mailing: Letters vs. Flats vs. Parcels
How USPS Sorts Mail
What happens to your letters when the USPS picks them up?
What is USPS First Class Mail? Shipping First Class Mail Explained
Mailing Cards: Calculating Postage + Tips for Troublesome/Embellished Cards
How To Mail USPS First Class Envelopes & Packages with Stamps
How USPS certified mail works!
USPS- First class vs. priority mail
USPS Mail Handler Assistant
Introduction to the USPS Mail Case
How To Send USPS Certified Mail and Return Receipts
How to Write a Friendly Letter
US Forever STAMP Maximum Weight & Dimensions Allowed COST Per Additional Ounce Letter 1st Class Mail
Confusing new blue mailboxes
How the US Postal Service reads terrible handwriting
How To Send Certified Mail
Postal Service Mail Sorters, Processors and Processing Machine Operators
Quick guide to casing mail at USPS
HOW TO ADDRESS A PACKAGE
USPS test: We mailed 4 packages with GPS trackers to see how quickly they got there