This content originally appeared on DEV Community and was authored by Joshua Karanja
Built a Flask Email API that sends emails via a POST request, deployed live on Render. Learned how to structure Flask apps, use blueprints, manage environment variables, and run Gunicorn in production.
Testing
I used Postman to test the endpoints:
GET / → Returns welcome message
POST /mail/send → Sends email with JSON payload
Challenges Faced
Initially hit 404 errors because the root blueprint wasn’t registered.
Learned the importance of blueprints and Gunicorn entry point in production.
Conclusion
This project was a great hands-on exercise for deploying Flask apps and handling production-ready email APIs. Next steps include adding authentication, logging, and a frontend UI.
Repo link:https://github.com/Joshuakaranja/Flask-Mail
This content originally appeared on DEV Community and was authored by Joshua Karanja
Joshua Karanja | Sciencx (2025-10-14T14:10:49+00:00) Deploying a Flask Email API on Render. Retrieved from https://www.scien.cx/2025/10/14/deploying-a-flask-email-api-on-render-2/
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