PineMail

What it does

Pine Mail is a tiny, self-hosted SMTP mail catcher for development environments — like Mailtrap or Mailpit, but written in Rust and built with AI-agent-driven testing in mind. Point your app's mailer at localhost:1025, and every email your app "sends" during dev gets caught, parsed, and shown in a clean web UI at localhost:8025 instead of actually leaving your network.

Pine Mail is a free, open-source, single-binary SMTP & SMS catcher for local development and automated testing. Long-polling API, Twilio webhooks, OTP/signal extraction, and a native MCP server with 14 tools for AI agents. Point your app at localhost:1025.

Pine Mail is a tiny, single-binary SMTP & SMS catcher for local development, automated tests, and AI agents. Long-polling wait APIs, automatic OTP extraction, Twilio webhooks — no cloud, no containers, no API keys. Your test suite hands a user a signup form. The app sends an email, then an SMS 2FA code. And everything falls apart on a sleep(), a poll, or a webmail screen. Mailtrap, SendGrid, and phone-verification SaaS fix the blast radius but chain your local suite to the network, API keys, and a pricing tier. MailHog and Mailpit read email from a browser tab. They don't catch SMS, poll awkwardly, and leave unparsed MIME payloads for your test code to fight. An autonomous agent can't…from yoosuf.me

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