<Li> The USPS is responsible for transporting mail between the United States and the associated states, and between the individual states of the Federated States of Micronesia . </Li> <Li> The associated states synchronize postal services and rates with the USPS . </Li> <Li> The USPS treats mail to and from the associated states as domestic mail, (as of November 19, 2007, after a 23 - month period of being treated as international mail). Incoming mail does require customs declarations because, like some U.S. territories, the associated states are outside the main customs territory of the United States . </Li> <P> In 2007, the US Postal Service discontinued its outbound international surface mail ("sea mail") service, mainly because of increased costs . Returned undeliverable surface parcels had become an expensive problem for the USPS . The discontinuation has been criticized by independent booksellers, by other small businesses which ship internationally, by the Peace Corps, and by military personnel . Domestic surface mail (now "Retail Ground" or "Commercial Parcel Select") remains available . </P>

Mail sent within the united states and its territories is called
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