What roles do SMTP and POP play in the sending and receiving of email over the I

Question

What roles do SMTP and POP play in the sending and receiving of email over the Internet? Use an example (sending and receiving an email using Outlook Express or Mozilla Thunderbird client application and SMTP and POP3 server applications) to discuss the roles. 8. 9 Retrieving emails from a POP server is considered insecure, especially when you are using Wireless LAN (WiFi). Explain why. Then, suggest a solution to this security problem. 10. Microsoft SMTP server we used for our Homework #2 does not require authentication (i.e., username and password). What problems would you expect if the server was deployed in real networks (the Internet)?

Explanation / Answer

SMTP:

The role of SMTP is to send mails through server.

Its an abbreviation for Simple Mail Transfer protocol.

It uses SSL and TLS for internet security.

When client send emails, SMTP is used here as client delivers messages to one or multiple servers.

Client uses 3 commands:

And send to server.

POP :

Its an abbreviation for Post office Protocol.

The role of POP is to Receive email from server.

The most current is POP3 which is powerful than other versions. It belongs to application layer of the protocol TCP/IP suite.

POP deletes the messages after downloading them.

Example:

Roles of a Sender and a Receiver are of sending and receiving emails that requires a procedure to be followed. That is explained below,

Sending and Receiving Email in Outlook on Windows.

Sending email :

Receiving Email :

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