Mailing-Client

SMTP Mailing Client

A simple Python mailing client that sends an email via SMTP with STARTTLS, including a text message and a file attachment. The project demonstrates secure email delivery using environment variables and TLS.

Files

• Mailing-Client/main.py – SMTP mail sender
• Mailing-Client/message.txt – email body content
• Mailing-Client/BC.jpg – example attachment
• Mailing-Client/.env – environment variables (not committed)
• Mailing-Client/.gitignore – excludes sensitive files

Features

• Secure SMTP connection using STARTTLS
• Credentials loaded from environment variables
• Explicit TLS certificate handling using certifi
• Supports UTF-8 text and binary file attachments
• Debug output enabled for SMTP session

Running the Client

Requirements

• Python 3.9+
• python-dotenv
• certifi

Install dependencies:

pip install python-dotenv certifi

Setup

Create a .env file in Mailing-Client/:

SMTP_USER_G=your_email@gmail.com
SMTP_PASSWORD_G=your_app_password

Run

python Mailing-Client/main.py

Notes

• Gmail requires an app-specific password for SMTP access.
• The .env file should never be committed to version control.
• This project is intended as a minimal demonstration of secure SMTP email sending in Python.