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Domestic Mail Manual (DMM®)
Select the best service for your domestic mailing or shipping needs, find preparation requirements, and more.
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Forms & Publications
Use these resources to find detailed information about or request USPS® products and services.
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Postal Explorer
Search our virtual library for information on USPS products and services for businesses.
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Business Mail 101
Find all the information you need to create a Direct Mail (Advertising) campaign.
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Quick Service Guides
Find summaries of price, preparation, and formatting standards for USPS service options.
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