Which document would you consult for the official rules about mail handling and standards?

Which document would you consult for the official rules about mail handling and standards?

• A. Cigarettes and Smokeless Tobacco guidelines
• B. Handbooks
• C. PolicyNet
• D. Domestic Mail Manual

Answer: (D)

The main idea is that the official, binding rules for how mail is handled and what standards apply are published in the Domestic Mail Manual. This document serves as the authoritative reference for USPS employees, detailing what items can be mailed, how to package and label mail, required addressing formats, class and rate rules, and the processing steps mail must go through. Because it codifies the exact guidelines used in day-to-day operations, it’s the primary source you’d consult for mail-handling standards. Other resources—such as tobacco product guidelines, general handbooks, or internal policy portals—provide useful context or supplementary guidance, but they don’t replace the formal rules found in the Domestic Mail Manual.