Postage stamps and postal history of Mexico
The Mexican postal system has its roots in the Aztec system of messengers which the Spanish adopted after the Conquest. A postal service was established in 1580, mainly to communicate between the viceroyalty of New Spain with the motherland Spain. During the 18th century, Spain established a formal postal system with regular routes. In 1856, Mexico issued its first adhesive postage stamps, with "district overprints", a unique feature among postal systems worldwide, employed to protect from theft of postage stamps. In 1891, the postal and stamp issuing authority was created as an administrative division of the Secretaría de Comunicaciones (Secretariat of Communications). It was called Servicio Postal Mexicano (Sepomex). In 1901, the Dirección General de Correos (General Direction of Mail) was made a separate government agency. The Palacio de Correos de Mexico is used since 1907 as main post office. The Mexican Revolution and ensuing Civil Wars (1910–1920) resulted in numerous provisional and local stamps issued by the factions in control of different areas of the country. Colonial period The postal system of Mexico may be said to have begun with the Aztecs, who operated a system of messengers; they worked well enough that Hernán Cortés continued using them after