Node.js Mail Server API for programmatic email sending

Mail Server API

Backend Architect2 MonthsBackendPersonal

Problem

Many developers rely on expensive third-party email services or complex SMTP setups for simple programmatic email triggers in their apps.

Solution

Built a lightweight, secure API wrapper around Nodemailer with JWT authentication, allowing developers to send emails via simple REST endpoints.

Tech Stack

Node.jsExpress.jsNodemailerJWTMongoDB

Challenges

  • Managing SMTP handshake timeouts and reliability
  • Implementing secure attachment handling and validation
  • Ensuring high deliverability rates by optimizing mail header configurations

Results

  • Created a zero-cost alternative for small-scale programmatic emailing
  • Achieved sub-second response times for email dispatch triggers
  • Implemented secure access control via JWT

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Mail Server API - Case Study | Mohammad Foysal | Mohammad Foysal