What is the Military Postal Service Agency (MPSA)?

The MPSA is an extension of the U.S. Postal Service. MPSA delivers mail to more than a million customers in more than 160 countries, not to mention aboard ships. The MPSA website has up-to-date information on how mail travels from your mailbox to your loved one's FPO address. The site also links to special mailing information, including mail restrictions.