Early time-sharing systems
- Several users concurrently using the same computer at
same time or different times
- Mail used for users to communicate
- Mail sent ONLY to users that could access that same
- Even more popular with Unix Systems in the 1970's
- Mail address was the username. Ex. mail pfranca
- Essentially you create a text file that is placed in
a "mail" folder belonging to the other user; each user has his/her own
ArpaNet (precursor of Internet)
- Several large computers interconnected; each could
have its own mail system
- Users could only send mail to other users capable of
accessing the same computer
- Bright idea: allow mail to be sent to one of the
other computers in the network.
- Mail pfranca@ucsc
would mean: send this mail to the computer "ucsc" and ask this computer to
place this mail on the folder for user "pfranca".
- Electronic mail became popular with research
community, because they were the only ones able to access such computers.
Online Services (AOL, Prodigy, etc.)
- Implemented email for their user community
- Mail Servers: computers that are able to receive and
- Mail Servers have a mailbox for each user that holds
mail in that particular server. (Ex. ucsc.edu; google.com; yahoo.com, etc.)
- Most likely users do not log on to the mail server to
see their mail. They use a Web Mail application or an E-mail Client
- Web Mail - use your computer to access a
remote web site where you can see and work with your mail.
- Web Mail is available in any computer, as
long as you can access the Internet.
- E-mail Client - use a software in your computer
that will communicate with a specific mail server (E.g. Outlook,
- Download your mail from the server to your
- Maintain all your mail in your computer;
- Upload outgoing mail to the mail server for
Issues with E-mail
- Very easy to operate
- Cut and paste contents
- Not secure - don't send your SSN!
- Is it authentic?