https://github.com/abdo-essam/smtp

Simple Mail Transfer Protocol
https://github.com/abdo-essam/smtp

smtp smtp-client smtp-mail smtp-protocol smtp-server

Last synced: about 1 year ago
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Simple Mail Transfer Protocol

• Host: GitHub
• URL: https://github.com/abdo-essam/smtp
• Owner: abdo-essam
• Created: 2023-02-26T23:56:01.000Z (over 3 years ago)
• Default Branch: main
• Last Pushed: 2023-03-03T17:30:59.000Z (over 3 years ago)
• Last Synced: 2025-01-22T05:41:22.658Z (over 1 year ago)
• Topics: smtp, smtp-client, smtp-mail, smtp-protocol, smtp-server
• Language: Java
• Homepage:
• Size: 1.26 MB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

          
# SMTP

A simple mail server written in Java

# Faculty Of Computer And Artificial Intelligence Cairo University `FCAI-CU`

## 	Computer Networks Technology Assignment

## Example Simulation of an SMTP Protocol interaction between a Client and a Server

![afdf](https://github.com/abdo-essam/SMTP/blob/main/Images/SMTP_commands_overview.png)

Client sends a HELO command to the server

- C: HELO example.com

- S: 250 Hello example.com, pleased to meet you.

Client sends a MAIL FROM command to the server

- C: MAIL FROM:

- S: 250 Ok

Client sends a RCPT TO command to the server

- C: RCPT TO:

- S: 250 Ok

Client sends a DATA command to the server

- C: DATA

- S: 354 Enter message, ending with "end of email" on a line by itself

Client sends the email message to the server

- C: Subject: This is the subject of the email

- C:

- C: This is the body of the email

- C: end of email

- S: 250 Ok: queued as 12345

Client sends a QUIT command to the server

- C: QUIT

- S: 221 Bye

-- In the above simulation, the client initiates the interaction by sending a 'HELO' command to the server to introduce itself. The server responds with a greeting and a message indicating that it's pleased to meet the client.

-- Next, the client sends a 'MAIL FROM' command to identify the sender of the email message. The server responds with an acknowledgement that the sender has been identified.

-- The client then sends a 'RCPT TO' command to identify the recipient of the email message. The server again responds with an acknowledgement that the recipient has been identified.

-- The client then sends a 'DATA' command to indicate that it will be sending the actual email message to the server. The server responds with a message indicating that it's ready to receive the email message.

-- The client then sends the email message to the server, including the subject and body of the message. After the client is finished sending the message, it sends a period (".") on a line by itself to indicate the end of the message. The server responds with an acknowledgement that the message has been queued for delivery.

-- Finally, the client sends a 'QUIT' command to indicate that it's finished with the SMTP session. The server responds with a goodbye message and closes the connection.

For more info you can visit : https://postmarkapp.com/guides/everything-you-need-to-know-about-smtp

![SMTP](https://img.shields.io/badge/SMTP-supported-brightgreen.svg)