Chapter 20 - Electronic Mail Introduction Description Of Functionality –send a single message to many recipients. –send a message that includes text, voice, video, and graphics. –send a message to a user on a network outside the Internet. –send a message to which a computer program responds. The Best Of All Worlds Each User Has A Mailbox For –Each individual who participates in electronic mail exchange has a mailbox identified by a unique address. Any user can send mail across the Internet to another user's mailbox if they know the mailbox address; only the owner can examine the contents of a mailbox and extract messages.

Chapter 20 - Electronic Mail Sending An Message Notification That Has Arrived Reading An Message –A computer connected to the Internet needs application software before users can send or receive electronic mail. software allows a user to compose and send a message or to read messages that have arrived. A user can send a reply to any message. – SMTP – POP-3 – IMAP Messages Look Like Interoffice Memos - smileys, CC, BCC

Chapter 20 - Electronic Mail Software Fills in Header Information –Although most messages contain many lines of header, software generates most of the header automatically. User-friendly software hides unnecessary header lines when displaying an message. How Works (CLIENT-SERVER) Using From A Personal Computer Mailbox Address Format - Abbreviations Make Friendly

Chapter 20 - Electronic Mail Aliases Permit Arbitrary Abbreviations –Most commercial software permits each user to define a set of abbreviations for frequently used mailbox addresses. If the user types an abbreviation when specifying a recipient, software substitutes the full mailbox address in place of the abbreviation. Aliases Shared By All Users Of A Compuer System Sending To Multiple Recipients Mailing List: An Alias for Multiple Recipients – A mailing list is an alias that specifies multiple recipients; when a message is sent to the alias, the e- mail system delivers a copy to each recipient on the list. Public Mailing Lists and Mail Exploders

Chapter 20 - Electronic Mail To And From Non-Internet Sites Access To Services Via –Because a computer program can answer and reply to an electronic mail message, can be used to provide access to a variety of remote services. Speed, Reliability, And Expectations Impact And Significance Of Electronic Mail –Because provides high-speed transfer while allowing the receiver to choose when to answer, it combines the benefits of instantaneous communication with freedom from interruption. –Because a mailing list allows an arbitrary group of individuals to exchange memos, it provides a way for a group of people who share a common interest to participate in a discussion.

Chapter 20 - Electronic Mail –Because most computer networks offer an electronic mail service that operates with electronic mail on the Internet, it is possible to communicate with more people using electronic mail than with any other Internet service. –Because electronic mail can include text, graphics, and voice, it can be used to transfer documents or recorded audio messages. –Because a computer program can answer electronic mail and send a reply automatically, many services on the Internet have been constructed so a user can submit a request and receive a response using electronic mail. Joining A Mailing List [tile.net & LISZT]

Chapter 20 - Electronic Mail Terms – electronic mail ( ) – mailbox – mailbox address – mail alias – mail exploder – mailing list – postmaster – smiley