DMM Advisory | Postal Explorer

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.

Pricing & Classification DMM Advisory

Message board to keep postal customers informed of changes to mailing standards, services, and prices.

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May 22, 2026

Monthly Labeling List Changes

Effective June 1, 2026, the Postal Service™ will revise Labeling List(s) L007, L012, L014, L015, L016, L201, and L606 to reflect changes in mail processing operations. Mailers are expected to label according to these revised lists for mailings inducted on or after the June 1, 2026, effective date through the July 31, 2026, expiration date.

Labeling Lists

L007 5-Digit Scheme—Periodicals, Standard Mail, and Package Services Flats in Bundles

Due to the extensive number of changes to the L007, these changes will not be published in thePostal Bulletin.The changes effective June 1, 2026, for the L007 can be found in Postal Pro at the following link: postalpro.usps.com/operations/labeling-lists/changes-june-2026.

All other EELLs changes effective June 1, 2026, can be found in Postal Pro as well.

The changes can be found in the May 14, 2026, Postal Bulletin.

Current Labeling Lists can be found on the FAST website at https://fast.usps.com/fast/fastApp/resources/labelListFiles.action