A letter is a written message conveyed from one person to another through a medium. The term usually excludes written material intended to be read in its original form by large numbers of people, such as newspapers and placards, although even these may include material in the form of an "open letter". The typical form of a letter for many centuries, and the archetypal concept even today, is a sheet of paper that is sent to a correspondent through a postal system. A letter can be formal or informal, depending on its audience and purpose. Besides being a means of communication and a store of information, letter writing has played a role in the reproduction of writing as an art throughout history. Letters have been sent since antiquity and are mentioned in the Iliad. Historians Herodotus and Thucydides mention and use letters in their writings.
The United States Postal Service is an independent agency of the executive branch of the United States federal government responsible for providing postal service in the United States, including its insular areas and associated states. It is one of the few government agencies explicitly authorized by the United States Constitution. The USPS, as of 2021, has 516,636 career employees and 136,531 non-career employees.
The mail or post is a system for physically transporting postcards, letters, and parcels. A postal service can be private or public, though many governments place restrictions on private systems. Since the mid-19th century, national postal systems have generally been established as a government monopoly, with a fee on the article prepaid. Proof of payment is usually in the form of an adhesive postage stamp, but a postage meter is also used for bulk mailing. With the advent of email, the retronym "snail mail" was coined.
Postal codes used in the United Kingdom, British Overseas Territories and Crown dependencies are known as postcodes. They are alphanumeric and were adopted nationally between 11 October 1959 and 1974, having been devised by the General Post Office. A full postcode is known as a "postcode unit" and designates an area with several addresses or a single major delivery point.
Canada Post Corporation, trading as Canada Post, is a Crown corporation which functions as the primary postal operator in Canada. Originally known as Royal Mail Canada, rebranding was done to the "Canada Post" name in the late 1960s, even though it had not yet been separated from the government. On October 16, 1981, the Canada Post Corporation Act came into effect. This abolished the Post Office Department and created the present-day Crown corporation which provides postal service. The act aimed to set a new direction for the postal service by ensuring the postal service's financial security and independence.
The Private Express Statutes (PES) are a group of United States federal civil and criminal laws placing various restrictions on the carriage and delivery of letters by all organizations other than the United States Postal Service.
Royal Mail Group plc is a British multinational postal service and courier company, originally established in 1516 as a government department. The company's subsidiary Royal Mail Group Limited operates the brands Royal Mail and Parcelforce Worldwide (parcels). GLS Group, an international logistics company, is a wholly owned subsidiary of Royal Mail Group. The group used the name Consignia for a brief period in the early 2000s.
A postal marking is any kind of annotation applied to a letter by a postal service. The most common types are postmarks and cancellations; almost every letter will have those. Less common types include forwarding addresses, routing annotations, warnings, postage due notices and explanations, such as for damaged or delayed mail and censored or inspected mail. A key part of postal history is the identification of postal markings, their purpose, and period of use.
Dead letter mail or undeliverable mail is mail that cannot be delivered to the addressee or returned to the sender. This is usually due to lack of compliance with postal regulations, an incomplete address and return address, or the inability to forward the mail when both correspondents move before the letter can be delivered. Largely based on the British model that emerged in the late eighteenth century, many countries developed similar systems for processing undeliverable mail.
Registered mail is a mail service offered by postal services in many countries, which allows the sender proof of mailing via a mailing receipt and, upon request, electronic verification that an article was delivered or that a delivery attempt was made. Depending on the country, additional services may also be available, such as:
Australia Post, formally the Australian Postal Corporation, is the government business enterprise that provides postal services in Australia. The head office of Australia Post is located in Bourke Street, Melbourne, which also serves as a post office.
Poste restante, also known as general delivery in North American English, is a service where the post office holds the mail until the recipient calls for it. It is a common destination for mail for people who are visiting a particular location and have no need, or no way, of having mail delivered directly to their place of residence at that time.
The British Forces Post Office (BFPO) provides a postal service to HM Forces, separate from that provided by Royal Mail in the United Kingdom. BFPO addresses are used for the delivery of mail in the UK and around the world. BFPO moved from its original base at Inglis Barracks, Mill Hill to its current base at RAF Northolt in northwest London in 2007.
In postal mail, a return address is an explicit inclusion of the address of the person sending the message. It provides the recipient with a means to determine how to respond to the sender of the message if needed.
The American Letter Mail Company was started by Lysander Spooner in 1844, competing with the presumed legal monopoly of the United States Post Office.
U.S. Special Delivery was a postal service paid for with additional postage for urgent letters and postal packets which are delivered in less time than by standard or first class mail service. Its meaning is different and separate from express mail delivery service. Essentially it meant that a postal packet was delivered from a post office to the addressee immediately once it arrived at the post office responsible for delivering it, rather than waiting for the next regular delivery to the addressee.
Croatian Post Inc., founded in 1999, is a business corporation in ownership of the Republic of Croatia. Croatian Post is a national postal operator of the Republic of Croatia. Post offices of the Croatian Post form one of the widest services and retail networks in the country. Apart from postal services Croatian Post offers also payment services, retail services and digital TV service in the whole territory of Croatia. Croatian Post is also one of the founders and a full member of the Association of European Public Postal Operators (PostEurop), while Croatia is a member of the Universal Postal Union (UPU). Croatian Post also issues postage stamps of Croatia.
Hybrid mail is mail that is delivered using a combination of electronic and physical delivery. Usually, it involves digital data being transformed into physical letter items at distributed print centres located as close as possible to the final delivery addresses. An e-mail letter is a letter which sent as an email using a computer then printed out and delivered as a traditional (physical) letter. It is a communication means between the cyber and the material world. The printer or mail transfer agent prints the electronic mail on paper, the mail transport agent packs it into an envelope and the mail delivery agent or postman delivers it to the receiver's mailbox. Generally there is a fee for this service; however very small amounts and single email letters may be free of charge depending on the service provider and generally fees are much lower than directly sending mail or using a franking machine. Research shows that in the UK, for a simple enclosed letter, posted 2nd class, the saving could be as much as much as 40% per letter.
The London Penny Post was a premier postal system whose function was to deliver mail within London and its immediate suburbs for the modest sum of one penny. The Penny Post was established in 1680 by William Dockwra and his business partner, Robert Murray. Dockwra was a merchant and a member of the Armourer and Brasiers Livery Company and was appointed a Customs Under-Searcher for the Port of London in 1663. Murray would later become clerk in the excise office of the Penny Post. The London Penny Post mail service was launched with weeks of publicity preceding it on 27 March 1680. The new London Penny Post provided the city of London with a much needed intra-city mail delivery system. The new Penny Post was influential in establishing a model system and pattern for the various Provincial English Penny Posts in the years that followed. It was the first postal system to use hand-stamps to postmark the mail to indicate the place and time of the mailing and that its postage had been prepaid. The success of the Penny Post would also threaten the interests of the Duke of York who profited directly from the existing general post office. It also compromised the business interests of porters and private couriers. The Penny Post was also involved in publishing various criticisms towards the British monarchy, the Duke of York in particular, which ultimately led to the take over of the Penny Post by crown authorities. The earliest known Penny Post postmark is dated 13 December 1680 and is considered by some to be the world's first postage 'stamp'.
A mail bag or mailbag is a generic term for a type of bag used for collecting, carrying, categorizing, and classifying different types of postal material, depending on its priority, destination, and method of transport. It is oftentimes used by a post office system in transporting these different grades of mail. The mailbag is carried by some means of transporting like a mail carrier, animal, or a mobile post office. Letters and printed material delivered by mail in the seventeen-hundreds were carried by horse in a saddle bag. There are several different types of mailbags for different purposes. These different styles of mailbags depend on its size and purpose. It can range from "a large bag used for transporting mail on a truck, plane, etc." to a simple "postbag" used by a mail carrier to deliver mail.