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Publication 52 - Hazardous, Restricted, and Perishable Mail >
2 General Guidelines > 21 Mailability > 212 Mailer Responsibility
All mailers, including mail service providers and other mailer agents, must comply with applicable Postal Service laws and regulations governing mailability and preparation for mailing, as well as nonpostal laws and regulations on the shipment of particular matter.
The Postal Service disseminates information about mailing standards by publishing the DMM and IMM and by providing this and other publications that give additional guidance to mailers.
Mailers need to be aware of current or new regulations adopted by the Postal Service and other governmental agencies.