E-mail & E-mail protocols

E-mail

• E-mail Stands for electronic mail is one of the most widely used features of the internet.
• Allows you to send and receive digital messages anywhere in the world.
• It is based on client server architecture that provides a root, stored message service between any two email accounts.
• Inventor: Ray Tomlinson, an American computer engineer
• Year: 1971
   

Advantages of Email

• Fast Communication
• Cost-Effective
• Easy to Use 
• Environmentally Friendly
• Accessibility
• Can Send multiple copies

Disadvantages of Email

• Spam and Junk Mail
• Security Risks 
• Requires Internet Access 
• Hard to Convey emotions

E-mail Protocols

(i) SMTP(Simple Mail Transfer Protocol)

(ii) MIME (Multipurpose Internet Mail Extensions)

(iii) POP3 (Post Office Protocol version 3)

(iv) IMAP4 (Internet Message Access Protocol)

(i) SMTP(Simple Mail Transfer Protocol)

• It is a push protocol.
• It is used to upload mail directly from the client to the E-mail server of the user.
• SMTP is a simple ASCII Protocol that uses TCP/IP networks.
• Some older versions of SMTP can't handle message sizes   above 69 Kb.

(ii) MIME (Multipurpose Internet Mail Extensions)

• It is also a push protocol.
• This protocol is used for sending binary files or email attachment over the internet.
• MIME allows an email message to contain a non- ASCII file such as an Image, audio, video, graphics etc.

(iii) POP3 (Post Office Protocol version 3)

• It is a pull protocol that is used to receive and open email.
• It deletes a message from the Server when a client reads the message.

(iv) IMAP4 - (Internet message Access Protocol)

• It is a pull protocol that is used to receive and open email.
• This protocol is designed to help users to need to use different types of computer in the office or at the home. 
• This protocol gives interactivity to the user that a user can see (read) a message on the PC without deleting from the server.