Added email attachment feature and logging system

[nunster3000]

Title:

📩 Added Email Attachments & Logging Feature

Description:

This pull request enhances the Automated Mailing System by adding support for email attachments and implementing a logging system to track sent emails. These improvements make the system more robust, user-friendly, and suitable for real-world email automation.

🔹 Features Added:
✅ Attachment Support:

Users can now attach files to emails (e.g., reports, invoices).
Handles missing attachments gracefully by providing a clear error message.
✅ Logging System:

Emails are now logged in email_log.csv with recipient, subject, and attachment details.
Improves traceability and debugging in automated email workflows.
✅ Error Handling Improvements:

SMTP connection failures are caught and displayed.
Prevents the system from crashing due to invalid files.
🔹 How These Changes Improve the Project:
📌 Enhances functionality by allowing file attachments.
📌 Adds reliability with logging, making it easier to track email deliveries.
📌 Improves user experience by preventing unhandled errors.
🔹 Testing Performed:
🔹 Successfully sent emails with and without attachments.
🔹 Verified that sent emails were correctly logged in email_log.csv.
🔹 Simulated SMTP failures to ensure the error handling works as expected.
📌 This PR is ready for review. Let me know if any modifications are needed! 🚀

Checklist:

Please tick all the boxes that are fulfilled by your Pull Request.

• I have named my files and folder, according to this project's guidelines.
• My code follows the style guidelines of this project.
• I have commented on my code, particularly in hard-to-understand areas.
• I have created a helpful and easy to understand README.md, according to the given README_TEMPLATE.
• My changes do not produce any warnings.