E Mail

E-Mail

Objective • • • • • • • •

What is E-mail? History of E-mail Format Major Sections How E-mail Works Things You Can Do with Email Email Address Advantages of E-mail

What is email? e

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mail

electronic = letters

Email • An electronic message sent from one computer to another. • An electronic document transmitted across a computer mail system

Origin • MIT(Massachusetts Institute of Technology) first demonstrated the Compatible Time-Sharing System (CTSS) in 1961 • It allowed multiple users to log into the IBM 7094 from remote dial-up terminals, and to store files online on disk • E-mail started in 1965 as a way for multiple users of a time-sharing mainframe computer to communicate • In 1982, the ARPANET(Advanced Research Projects Agency Network) email proposals were published as RFC 821 (transmission protocol) and RFC 822 (message format)

Format • The format of Internet e-mail messages is defined in RFC 5322 and a series of RFCs , RFC 2045 through RFC 2049, collectively called Multipurpose Internet Mail Extensions (MIME).

Internet e-mail messages consist of two major sections: • Header — Structured into fields such as summary, sender, receiver, and other information about the e-mail • Body — The message itself as unstructured text; sometimes containing a signature block at the end

Header fields The message header usually includes at least the following fields: • From: The e-mail address, and optionally the name of the sender • To: The e-mail address[es], and optionally name[s] of the message's recipient[s] • Subject: A brief summary of the contents of the message • Date: The local time and date when the message was written Other common header fields include • Cc: Carbon copy- indirectly addressing •

Things You Can Do with Email • Compose and Send: write an email and send it to others. • Reply: reply to an email that you received. • Forward: pass on an email that you received to others. • Attachment: You can send files with your email such as: pictures, music, software and documents

How does Email Work? Email travels via the Internet from one computer to another. Computers known as mail servers direct outgoing mail and store incoming the mail. Once email reaches your mail server, it waits in an electronic mail box, the "Inbox” for you to collect

Email Address An email address consists of 3 parts: [email protected]

Unique User Name chosen by the email account owner

Domain Name “ At” sig n

company/organization providing the email service

Advantages of E-mail • • • • •

Managing Email is Easy Email is Fast Email is Inexpensive Email is Easy to Filter Transmission is Secure and Reliable

THANX