USPS Postage Help Center

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Priority Mail®

Learn more about the US Postal Service’s low cost shipping option that delivers packages within 2 – 3 days.
Learn more about Priority Mail.


USPS® Mail Classes and Services

Learn more about USPS Mail Classes and Special Services

Package Tracking: Check the delivery status of your USPS Package

CLICK HERE!

Address Cleansing

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Address Cleansing

For Stamps.com customers, addresses are automatically cleansed to match USPS specifications. This can prevent returned mail and improve deliverability.
Address Cleansing Basics

USPS Postage Rates

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USPS Postage Rates

For Stamps.com customers, postage rates are automatically calculated using current rates.
Current Postage Rates

Free USPS Supplies

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Free USPS Supplies

The USPS offers free shipping supplies to send packages through certain classes of mail. Order your free Priority Mail Express or Priority Mail pre-printed boxes, stickers, or forms today.
Order Free USPS Supplies

Shipping Rate Comparison

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Shipping Rate Comparison

Lower your shipping costs. See why USPS shipping rates can be much lower than UPS or FedEx®. Start saving money today!
Compare Shipping Rates

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6 tips for Package Shipping to APOs/FPOs

Six tips for letters and packages being sent to an APO or FPO military base.
Learn more about shipping to APOs/FPOs

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8 Tips to Lower Your Mailing and Shipping Costs

Check out these eight great tips on how to make your mailing and shipping budget go the extra mile.
Great tips to help you save on shipping

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Use Media Mail

Media Mail allows you to send pounds of media for a fraction of the cost, which can save your small business money.
Use Media Mail to save on shipping