Email

email or e-mail is an acronym for Electronic mail. Email is a method of exchanging digital messages from an author to one or more recipients. Modern email operates mainly across the Internet. Today's email systems are based on a store-and-forward model. Email servers (computers) accept, forward, deliver, and store messages. Neither the users nor their computers are required to be online simultaneously; they need connect only briefly, typically to a mail server (computer), to send or receive messages. An Internet email message consists of three components, the message envelope, the message header, and the message body. The message header contains control information, including, minimally, an originator's email address and one or more recipient addresses. Usually descriptive information is also added, such as a subject header field and a message submission date/time stamp.

Text is available under the Creative Commons Attribution-ShareAlike License; additional terms may apply. Source: Wikipedia