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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April 8, 2026

Military Post Office (MPO) 09309 Service Resumption Notice

Effective immediately, the Postal Service™ has resumed acceptance of mail destined to Military Post Office (MPO) ZIP Code 09309.

All mailing services have resumed, including Priority Mail Express International^® (PMEI), Priority Mail International^® (PMI), First-Class Mail International^® (FCMI), First-Class Package International Service^® (FCPIS^®), International Priority Airmail^® (IPA^®), and M-Bag^® items.

Please visit our International Service Alerts page for the most up to date information: https://about.usps.com/newsroom/service-alerts/international/?utm_source=residential&utm_medium=link&utm_campaign=res_to_intl