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(Electronic-MAIL) The transmission of text messages from sender to recipient. Email messages can also be formatted with graphics like a brochure or Web page, an enhancement that many users like, but that creates more spam and a security risk (see HTML email).

Users can send a mail message to a single recipient or to multiple users. In addition, JPEG photos as well as any other type of computer file may be attached to the message (see email attachment). Mail is sent to a simulated mailbox in the organization's mail server until it is downloaded to the "in" mailbox in the user's computer.

The Messaging System and the Client
An email system requires a messaging system, which is primarily a store and forward capability based on the Internet's Simple Mail Transfer Protocol (SMTP). A mail program (email client), such as Windows Mail, Mac Mail, Outlook and Eudora, provides the user interface for mailboxes and send and receive functions. Popular email services such as Gmail and Yahoo! Mail are Web based, in which case the Web browser is used as the mail program (see email interfaces).

The Internet Changed It All
The Internet revolutionized email by turning countless incompatible islands into one global system. Initially serving its own users, in the mid-1990s, the Internet began to act as a mail gateway between the major online services such as CompuServe and America Online (AOL). It then became "the" messaging system for the planet. In the U.S., Internet mail is measured in the trillions of messages each year. See email vs. fax, messaging system, instant messaging, read receipt and self-destructing email.

Could They Have Imagined Spam?
When they sent this first message in 1971, could they have imagined the trillions of email messages that would follow in years to come? (Image courtesy of Dan Murphy,

The First Email on the Internet

In 1971, the first email message was typed into the Teletype terminal connected to the Digital Equipment PDP-10 toward the back of the room in the following picture. The message was transmitted via ARPAnet, the progenitor of the Internet, to the PDP-10 in front. Dan Murphy, a Digital engineer, took this photo in the Bolt, Beranek and Newman datacenter. See ARPAnet.

Could They Have Imagined Spam?
When they sent this first message in 1971, could they have imagined the trillions of email messages that would follow in years to come? (Image courtesy of Dan Murphy,
References in periodicals archive ?
These results suggest that this is not a problem, but that conclusion could change if more patients begin e-mailing, he added.
An e-Mailing List is a group of e-mail addresses that can be contacted all at once.
HARRY WOLF, e-mailing from Canada, said: "Coventry is becoming a city of car parks and shops when once it was the home of the largest manufacturing facilities in the world.
Committee chairman Takao Fujii of the ruling Liberal Democratic Party added that e-mailing ''disrupts order'' in the chamber and ''the sense of tension is lost.
Application kits are available at most institutional offices of sponsored research and may be obtained from the Division of Extramural Outreach and Information Resources, NIH, 6701 Rockledge Drive, MSC 7910, Bethesda, MD 20892-7910 USA, by calling 301-435-0714, or by e-mailing grantsinfo@ nih.
Two boys had been e-mailing each other soft porn images and one of the boys managed to bring up an image from his e-mail while at school.
An elderly woman e-mailing a relative in the Ukraine;
Before e-mailing the resume to the company, send a copy to yourself first to make sure the format and font show up fine, he said.
So he's on the Internet, plugged into the house phone line, Tyler's using the fax line and they're checking out Web sites and then e-mailing each other about them, even though they're in the same room.