The Problem If you've ever tried to use a disposable email service on Instagram, TikTok, or Netflix — you know the pain. They get rejected instantly because platforms maintain blacklists of known fake domains. I kept hitting this wall while testing registration flows for my own projects. So I built the solution myself. The Idea Instead of fake domains, use real, active Microsoft accounts as a temporary inbox pool. Assign them to users on demand, let them receive the verification code, then reclaim the address. Simple concept. Surprisingly tricky to execute at scale. Tech Stack Backend: Python / Flask Database: MySQL (PyMySQL) Email access: Microsoft Graph API (OAuth2 + refresh tokens) Auth: bcrypt + session-based for web, API key for REST Payments: NowPayments (crypto) Rate limiting: flask-limiter The Hard Part — Microsoft Graph API Getting inbox access via Graph API is straightforward for a single account.…