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PRACTICAL NO. 9
Aim: Study of an E-mail system
What is email?
e = electronic
mail = letters
An electronic message sent from one
computer to another. An electronic document transmittedacross a
computer mail system
Origin MIT(Massachusetts Institute of
Technology)firstdemonstrated the Compatible
Time-SharingSystem(CTSS) in 1961
It allowed multiple users to log into the IBM7094 fromremote
dial-up terminals, and to store filesonline on disk
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E-mail started in 1965 as a way for multipleusers of
atime-sharing mainframe computertocommunicate In 1982, the
ARPANET(Advanced ResearchProjectsAgency Network) email proposals
werepublished asRFC 821 (transmission protocol) and RFC 822
(message format)
Format The format of Internet e-mail messages isdefined in RFC
5322 and a series ofRFCs, RFC 2045 through RFC 2049,
collectively calledMultipurpose Internet Mail
Extensions(MIME).
Internet e-mail messages consist of twomajor sections:
Header Structured into fields such assummary, sender, receiver,
and otherinformation about the e-mail Body The message itself
asunstructured text; sometimes containing a
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signature block at the end
Header fieldsThe message header usually includes at
leastthefollowing fields: From: The e-mail address, and optionally
thename 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 ofthemessage Date: The local time and date when
themessage
was writtenOther common header fields include Cc: Carbon copy-
indirectly addressing Bcc: Blind Carbon Copy- unknown to the
rest
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.
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Forward: pass on an email that you receivedto others.
Attachment: You can send files with youremail 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 outgoingmail and store incoming
the mail.Once email reaches your
mail server, it waits in anelectronic mail box, the"Inbox for
you to collect
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it.
Email AddressAn email address consists of 3 parts:
[email protected]
Unique User Name( Yogeshmuneja)- chosenby the email account
owner
AtsignDomain Name(gmail)-company/organizationproviding the email
service
Advantages of E-mail
Managing Email is Easy Email is Fast Email is Inexpensive
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Email is Easy toFilter Transmission is Secure and Reliable
***** THANK YOU *****
