What type of mail does the Domestic Mail Manual (DMM) cover?

The Domestic Mail Manual (DMM) provides comprehensive guidelines for all types of mail services within the United States, which includes both commercial and personal mail. This means that it covers everything from standard letters and packages sent by individuals to bulk mail and promotional materials used by businesses. By encompassing a wide range of mail types, the DMM serves as a vital resource for anyone handling postal services, enabling them to understand the rules, rates, and regulations applicable to their specific mailing needs. This inclusive approach ensures that both personal and commercial users can access the information necessary for effective mailing practices.