Apr 10
aside
email
Topics I asked you read :
Discuss of email protocols, how it works,
and what the problems are. Issues to talk about:
variations: facebook, twitter, other social networks, phone text messages, ...
SMTP protocol interaction example
mahoney@cs ~$ telnet mail.marlboro.edu 25
Trying 10.1.2.5...
Connected to akbar.marlboro.edu.
Escape character is '^]'.
220 akbar.marlboro.edu ESMTP Postfix (Debian/GNU)
HELO jim.marlboro.edu
250 akbar.marlboro.edu
MAIL FROM:<mahoney@marlboro.edu>
250 Ok
RCPT TO:<mahoney@marlboro.edu>
250 Ok
DATA
354 End data with <CR><LF>.<CR><LF>
From: "Jim Mahoney" <mahoney@marlboro.edu>
To: "Jim Mahoney" <mahoney@marlboro.edu>
Subject: SMTP test
Hey. This is a test.
.
250 Ok: queued as 0551A11E558
QUIT
221 Bye
Connection closed by foreign host.
spam
Why is spam such an issue?
- cost/benefit economics ...
- problems with the protocol itself
- opportunities for making money :
How can you avoid it?
security 101
