An email client, email reader or, more formally, message user agent (MUA) or mail user agent is a computer program used to access and manage a user's email.
The United States Postal Service (USPS), also known as the Post Office, U.S. Mail, or Postal Service, is an independent agency of the executive branch of the United States federal government responsible for providing postal service in the U.S., including its insular areas and associated states. It is one of the few government agencies explicitly authorized by the Constitution of the United States. The USPS, as of 2021, has 516,636 career employees and 136,531 non-career employees.
Canada Post Corporation, trading as Canada Post, is a Crown corporation that 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 that provides postal service. The act aimed to set a new direction for the postal service by ensuring its financial security and independence.
Multimedia Messaging Service (MMS) is a standard way to send messages that include multimedia content to and from a mobile phone over a cellular network. Users and providers may refer to such a message as a PXT, a picture message, or a multimedia message. The MMS standard extends the core SMS capability, allowing the exchange of text messages greater than 160 characters in length. Unlike text-only SMS, MMS can deliver a variety of media, including up to forty seconds of video, one image, a slideshow of multiple images, or audio.
Various anti-spam techniques are used to prevent email spam.
In a postal system, a delivery point is a single mailbox or other place at which mail is delivered. It differs from a street address, in that each address may have several delivery points, such as an apartment, office department, or other room. Such buildings are often called multiple-dwelling units (MDUs) by the USPS.
A post office box is a uniquely addressable lockable box located on the premises of a post office.
A letter box, letterbox, letter plate, letter hole, mail slot or mailbox is a receptacle for receiving incoming mail at a private residence or business. For outgoing mail, Post boxes are often used for depositing the mail for collection, although some letter boxes are also capable of holding outgoing mail for a carrier to pick up. Letterboxes or mailboxes use the following primary designs:
A suite is the location of a business within a shopping mall or office building. The suite's number also serves as a sort of address within an address for purposes of mail delivery and pickup.
Email filtering is the processing of email to organize it according to specified criteria. The term can apply to the intervention of human intelligence, but most often refers to the automatic processing of messages at an SMTP server, possibly applying anti-spam techniques. Filtering can be applied to incoming emails as well as to outgoing ones.
Disposable email addressing, also known as DEA or dark mail or "masked" email, refers to an approach which involves a unique email address being used for every contact, entity, or for a limited number of times or uses. The benefit is that if anyone compromises the address or utilizes it in connection with email abuse, the address owner can easily cancel it without affecting any of their other contacts.
Within the United States, a commercial mail receiving agency (CMRA) is a private business that accepts mail from the Postal Service on behalf of third parties. A CMRA may also be known as a mail drop.
Post offices and other mail service providers typically offer a mail forwarding service, commonly known as hybrid mail or virtual post office box services, to redirect mail addressed to one location to another address – usually for a given period. In the case of the United States Postal Service's First Class Mail, it is generally for a period of one year. British Royal Mail provides a service called Mail Redirection, enabling redirection for up to two years. Customers of such a service usually, but not exclusively, use mail forwarding when they change an address.
In banking, a lockbox is a service offered to organizations by commercial banks to simplify collection and processing of accounts receivable by having those organizations' customers' payments mailed directly to a location accessible by the bank.
Email forwarding generically refers to the operation of re-sending an email message delivered to one email address to one or more different email addresses.
A mailbox is the destination to which electronic mail messages are delivered. It is the equivalent of a letter box in the postal system.
National Change of Address (NCOALink) "is a secure dataset of approximately 160 million permanent change-of-address (COA) records consisting of the names and addresses of individuals, families and businesses who have filed a change-of-address with the USPS". It is maintained by the United States Postal Service and access to it is licensed to service providers and made available to mailers. There are six licenses available including Full Service Providers and Limited Service Providers. The use of NCOALink is required in order to obtain bulk mail rates, as it minimizes the number of UAA mailpieces saving the mailer money and reducing the USPS's processing of this type of mail.
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.
STD-4C or STANDARD-4C refers to a set of standards and regulations set by the United States Postal Service regarding the specifications of cluster mailbox units used in new construction. All multi unit constructions building plans submitted after October 6, 2006 are required to use STD-4C compliant mailboxes
A mailbox provider, mail service provider or, somewhat improperly, email service provider is a provider of email hosting. It implements email servers to send, receive, accept, and store email for other organizations or end users, on their behalf.
