What's Email? Email is "electronic mail." - one of the most popular used services on the Internet. It enables messages to be transferred from an individual to another individual or from an individual to a group of people. Documents (and audio, video, pictures etc.) can be "attached" to email messages and sent along with the message. Email can be sent to any other email "box" in the world. In seconds. Generally, there are two ways to send and receive email – E-mail client (a Mail User Agent (MUA)): A computer program (like Microsoft Outlook Express) designed specifically for the purpose of receiving, reading, composing and sending e-mail. Webmail: A Web application (webapp) software that uses the Web browser, such as Microsoft’s Internet Explorer, to use and access email An email message consists of several components - Header, which consists of fields, usually including at least the following: From: The e-mail address from where the message was sent (and might also include the name of the sender of the message). To: The e-mail address to where it was sent (and might also include the name of the receiver of the message). Subject: A brief summary of the contents of the message. Date: The time and date the message was originally sent. Other common header fields might include: Cc: carbon copy: Address to where this message was also sent. Some e-mail programs offer a "Bcc" (Blind carbon copy) option which is used to send a message to additional recipient(s), but those recipients in the “bcc” field will not be visible to any recipient Body or the message itself. Attachment(s):  Documents (and/or audio, video, pictures etc.) can be "attached" to email messages and sent along with the message.