SUBIKASH RATHPRN No: 102027

Contents

• What is email?• Origin • Working of email Servers• Uses• Limitations

Email and History

• Electronic mail, commonly called email or e-mail, is a method of exchanging digital messages across the Internet.

• Email was transmitted directly from one user to another computer. This required both computers to be online at the same time.

• Today's email systems are based on a store-and-forward model.

Email and History

• Email servers accept, forward, deliver and store messages.

• Originally a text-only communications medium, email was extended to carry multi-media content attachments called MIME Multipurpose Internet Mail Extensions

• Network-based email was initially exchanged on the ARPANET in extensions to the File Transfer Protocol (FTP), but is now carried by the Simple Mail Transfer Protocol (SMTP),

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 7094from remote dial-up terminals, and to store files online on disk.

• Host-based mail systems: This systems allowed communication only between users who logged into the same host or "mainframe“.

Origin

• LAN-based mail systems: Eventually these systems could also be linked between different organizations, as long as they ran the same email system and proprietary protocol.

• Email ID: hubhost!middlehost!edgehost!user@uucpgat eway.somedomain.example.com

Working

Uses

• In Society • Flaming• In Business

Limitations

• Attachment size limitation• Information overload• Spamming and computer viruses• E-mail spoofing• E-mail bombing• Privacy concerns• Tracking of sent mail

Any Queries ?IMAP

Memory Management

Simple mail Transmission ProtocolVirtualization

Flaming

Outbox

What is email?

Capasity

DOS

Drafts

YahooIMAP

POP3 POP3

Browser

MSN Mail

Gmail

Inbox

Any Queries???

Spoofing

Bombing