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USPS.com home. The profile of an eagle's head adjoining the words United States Postal Service are the two elements that are combined to form the corporate signature. Postal Explorer
The Postal Service is reminding customers that metallic mercury and devices containing metallic mercury are always prohibited in the mail stream. This includes antique items such as thermometers, barometers, blood pressure monitors and similar devices.
Check out the new Postal Customer Guide!
This guide explains the domestic and international products and services for mailing and shipping available for individuals, businesses, and organizations. The Postal Service offers several options for domestic and international mailing and shipping for retail and commercial services.

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  1. Domestic Mail
  2. Domestic Mail Manual (DMM)HTML|PDF
  3. DMM Subject IndexHTML|PDF
  4. DMM Summary of ChangesHTML|PDF
  5. Quick Service GuidesHTML|PDF
  6. Customer Support Rulings (CSR)HTML
  7. Postal Addressing Standards (PUB 28)HTML|PDF
  8. Nonprofit USPS Marketing Mail Eligibility (PUB 417)HTML|PDF
  9. A Customer's Guide to Mailing (DMM 100)HTML|PDF
  10. Hazardous, Restricted, and Perishable Mail (PUB 52)HTML|PDF
  11. HAZMAT Search Tool
  12. PACT Act Information and Forms (Including ENDS/Vaping Requirements)
  13. Are you having problems viewing the PDF Files Click here
  1. International Mail
  2. International Mail Manual (IMM)HTML|PDF
  3. IMM Subject IndexHTML|PDF
  4. Individual Country ListingsHTML|PDF
  5. Country Price Groups and Weight LimitsHTML|PDF
  6. DMM and IMM Pending Updates
  7. DMM and IMM UpdatesDocuments
  8. Prices
  9. Price List (Notice 123)HTML|PDF
  10. Time-Limited Price Change 10/04/26 - 01/17/27Documents
  11. July 2026 Price Change Effective 07/12/2026 Documents
  12. Network Redesign

    1. Industry Alerts

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