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Is neighbor's Wi-Fi signal free for me to use?

Q. The other day, my Internet service went down as it does from time to time. But this particular time, I needed to check my e-mail for an important reply I was expecting. After some frustrating time passed, I happened to ...

How 2 ... Call back sent e-mail in Gmail

Ever realize you accidentally hit "Reply All" seconds after it was too late? Or forget to send the attachment mentioned in your message? With Gmail's "Undo Send" and "Forgotten Attachment Detector" features, you can give ...

Hackers protest BART decision to block cellphones

(AP) -- Hackers broke into a website for San Francisco's mass transit system Sunday and posted contact information for more than 2,000 customers, the latest showdown between anarchists angry at perceived attempts to limit ...

Hacker to appear in LA court over celebrity hacking

A Florida computer hacker was ordered Friday to appear in a Los Angeles courtroom on November 1 after he entered no plea during a federal court appearance on Friday, court officials said.

Publisher retracts 64 articles for fake peer reviews

(Phys.org)—German based publishing company Springer has announced on its website that 64 articles published on ten of its journals are being retracted due to editorial staff finding evidence of fake email addresses for ...

Hackers hit ArcelorMittal's Belgian website

The online piracy group Anonymous hacked into the Belgian website of industrial giant ArcelorMittal on Friday, posting a video to protest the closure of two blast furnaces in Belgium.

A device attempts to elevate the iPad's keyboard

Even if you love the iPad, you're probably not keen to write your next novel using its on-screen virtual keyboard. You may not be thrilled to type up a lengthy email with it, either.

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E-mail

Electronic mail, often abbreviated as email or e-mail, is a method of exchanging digital messages, designed primarily for human use. E-mail systems are based on a store-and-forward model in which e-mail computer server systems accept, forward, deliver and store messages on behalf of users, who only need to connect to the e-mail infrastructure, typically an e-mail server, with a network-enabled device (e.g., a personal computer) for the duration of message submission or retrieval. Rarely is e-mail transmitted directly from one user's device to another's.

An electronic mail message consists of two components, the message header, and the message body, which is the email's content. The message header contains control information, including, minimally, an originator's email address and one or more recipient addresses. Usually additional information is added, such as a subject header field.

Originally a text-only communications medium, email is extended to carry multi-media content attachments, which were standardized in with RFC 2045 through RFC 2049, collectively called, Multipurpose Internet Mail Extensions (MIME).

The foundation for today's global Internet e-mail service was created in the early ARPANET and standards for encoding of messages were proposed as early as, for example, in 1973 (RFC 561). An e-mail sent in the early 1970s looked very similar to one sent on the Internet today. Conversion from the ARPANET to the Internet in the early 1980s produced the core of the current service.

Network-based email was initially exchanged on the ARPANET in extensions to the File Transfer Protocol (FTP), but is today carried by the Simple Mail Transfer Protocol (SMTP), first published as Internet Standard 10 (RFC 821) in 1982. In the process of transporting email messages between systems, SMTP communicates delivery parameters using a message envelope separately from the message (headers and body) itself.

This text uses material from Wikipedia, licensed under CC BY-SA