30 points) Study SMTP (the textbook has a good description, you can also look at RFC 5321 or Wikipedia article, which has a good example of a typical SMTP exchange). The goal of this part of the assignment is try to directly communicate with an MTA pretending to be another MTA sending a message.

From a computer with a UNH IP address (this is important), connect to the mail server running at berlioz.cs.unh.edu on port 25 using nc (or a telnet client, note that telnet is not installed on agate to discourage people from using it for remote access) and pretend to be an MTA delivering a message addressed to your email address. Use subject "SMTP test" and make sure that you are identified in the body of the message. Capture the session and turn it in as a part of the assignment paper. Technically, you can use any mail server for the assignment, however, I would like to ask you to use the one specified above. While there is nothing technically wrong with connecting to any mail server, typos-filled hand-typed sessions tend to trigger various security alarms. I have learned this the hard way when the course was offered in the past and would like to avoid such problems this time around. Analyze its full header. Point out all the information that may indicate that the message did not originate from a legitimate source.

Write as-short-as-possible script that delivers an email message by (partially) implementing SMTP conversation. You are not allowed to use any command or utility for direct sending of email (e.g., the mail command in Unix/Linux) or You are not allowed to use any library for sending email (e.g., javax.mail). Basic shell, nc and expect are probably good starting points in your search for the right tools. You are not expected to do extensive error checking.