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Internet Mail Systems

This material is prepared for the students attending "Computer Networks" to help them better understand the Internet mail system.

Kyungran KANG

on 25 April 2014

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Transcript of Internet Mail Systems

Internet Mail Systems
Internet Mail
Postal mail vs. Internet Mail
Mail transfer protocol
Mail access protocol
Email exchange scenario
Postal mail vs. Internet Mail
postal mail
Mail Transfer Protocol
Simple Mail Transfer Protocol (SMTP)
Mail Access Protocol
Mail retrieval from the mailbox at the server
POP: Post Office Protocol [RFC 1939]: authorization, download.
IMAP: Internet Mail Access Protocol [RFC 1730]: more features, including manipulation of stored msgs on server
HTTP: gmail, Hotmail, Yahoo! Mail, etc.

Internet mail
S: 220 hamburger.edu

C: HELO crepes.fr
S: 250 Hello crepes.fr, pleased to meet you

C: MAIL FROM: <alice@crepes.fr>
S: 250 alice@crepes.fr... Sender ok

C: RCPT TO: <bob@hamburger.edu>
S: 250 bob@hamburger.edu ... Recipient ok

S: 354 Enter mail, end with "." on a line by itself

C: Do you like ketchup?
C: How about pickles?
C: .
S: 250 Message accepted for delivery


S: 221 hamburger.edu closing connection

S: +OK POP3 server ready
C: user bob
S: +OK
C: pass hungry
S: +OK user successfully logged on
C: list
S: 1 498
S: 2 912
S: .
C: retr 1
S: <message 1 contents>
S: .
C: dele 1
C: retr 2
S: <message 1 contents>
S: .
C: dele 2
C: quit
S: +OK POP3 server signing off
Email Exchange Scenario
Full transcript