How to Build a Disposable Email Checker for a SaaS Signup Flow
Introduction
A SaaS signup form looks simple from the user's perspective.
They enter an email address, choose a password, and click Create Account.
Behind that button, however, your application may be doing much more:
User
↓
Signup request
↓
Authentication
↓
Email validation
↓
Disposable email detection
↓
Account creation
↓
Trial allocation
↓
API...