Python Script for Email Verification

I need a Python script that utilizes SMTP or API call to verify a variety of email addresses (corporate and personal) and return whether they are valid or bounced. The script should be open-source and can optionally store results in a database.

Ideal Skills:
- Proficient in Python
- Experience with SMTP
- Knowledge in email verification techniques
- Familiarity with open-source software
- Database management skills (optional)

Please include in your bid examples of similar projects you have completed.