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.

Sorting & Delivery Center (S&DC)

Industry Alert	Published Date
Postal Service Updates for July 2026 S&DC Activations	04/23/26
Postal Service Updates for May and June 2026 S&DC Activations	04/22/26
Postal Service Updates for March 2026 S&DC Activations	02/13/26
Postal Service Updates for January and February 2026 S&DC Activations	01/07/26
Postal Service Updates for November 2025 S&DC Activations	10/31/25
Postal Service Updates October 2025 S&DC Activations and Announces 14 S&DC Activations for November 2025	09/25/25
Postal Service Launches Eleven New Sorting and Delivery Centers in September and October 2025	08/11/25
Postal Service Launches Twenty-Two New Sorting and Delivery Centers in May and July	05/12/25
Postal Service Launches Twelve New Sorting and Delivery Centers	01/13/25
Postal Service Launches Fifteen New Sorting and Delivery Centers	07/26/24
Postal Service Launches Eight New Sorting and Delivery Centers	04/26/24
Postal Service Expanding Panama City and Pompano Beach S&DCs	02/15/24
Postal Service Enhances Access to Sorting and Delivery Centers	01/26/24
Postal Service Launches Eighteen New Sorting and Delivery Centers	12/15/23
Update: November 2023 Mail Direction Files (MDF)	10/20/23
Mail Direction File (MDF) Errata File Has Been Updated	09/06/23
UPDATE: Postal Service Launches Seven New Sorting and Delivery Centers	09/01/23