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.

Additional Network Updates

Industry Alert	Published Date
USPS Modernization Through Package Equipment Upgrades in June 2026	06/03/26
Updated - 2026 Labeling List and Mail Direction File (MDF) Timeline	05/20/26