https://www.usps.com › USPS®
广告Fast, Convenient Shipping with Low Flat Rates. Send Your Mail with USPS®. USPS Flat Rate Offers One Rate to Any State. Learn More & Ship Online Today!
Order Free Supplies · Ship to Military · Print Shipping Labels · Buy Stamps
Services: Click-N-Ship, Stamps & Supplies, Informed Delivery, New Passport