emailmedium2-4 hours5 phases
Email Verification System
Secure email verification with token generation, expiry, and resend functionality
emailverificationauthenticationsecuritytokens
Overview
Build a complete email verification system that sends verification links to users, validates tokens securely, and handles edge cases like expired tokens and resend requests.
What You'll Build
- •Secure token generation and storage
- •Configurable token expiration
- •Email sending with verification links
- •Token validation API endpoints
- •Resend verification flow
- •User-facing verification page
Prerequisites
- •Database (PostgreSQL, MySQL, or similar)
- •Email service (Resend, SendGrid, Postmark, or SMTP)
- •Basic user authentication system
Architecture
┌─────────────┐ ┌─────────────┐ ┌─────────────┐
│ User │────▶│ Your API │────▶│ Database │
│ │ │ │ │ (Tokens) │
└─────────────┘ └──────┬──────┘ └─────────────┘
│
▼
┌─────────────┐
│ Email │
│ Service │
└──────┬──────┘
│
▼
┌─────────────┐
│ User's │
│ Inbox │
└─────────────┘
Flow:
1. User signs up → API creates token → stores in DB
2. API sends verification email with token link
3. User clicks link → API validates token
4. Token valid → Mark user verified, delete token
Phases Overview
| Phase | Focus | Time |
|---|---|---|
| 01 | Database Schema | 15-30m |
| 02 | Token Service | 30-45m |
| 03 | Email Service | 30-45m |
| 04 | API Routes | 30-45m |
| 05 | Frontend UI | 30-45m |
Security Principles
- •Tokens are cryptographically random (32+ bytes)
- •Single-use: deleted after verification
- •Time-limited: default 24h expiry
- •Rate-limited: prevent abuse on resend
- •No information leakage in error messages
Get Started
01
Database Schema Setup
15-30 minutes
02
Token Generation Service
30-45 minutes
03
Email Service Integration
30-45 minutes
04
API Routes
30-45 minutes
05
Frontend UI Components
30-45 minutes
Want to contribute?
This blueprint is open source. Found an issue or want to improve it? Edit on GitHub