Transactional Email, Simplified

Send password resets, notifications, and receipts through one API. Sandbox mode captures every email for inspection — flip to live when you're ready.

Simple Send API

One POST to send an email. HTML or plain text, single or batch. Server-scoped API keys keep things isolated.

Sandbox Mode

Every email captured and viewable in the activity feed. Preview HTML, inspect headers, trace events — no emails actually sent.

Zero Code Changes

Same API for sandbox and production. Toggle the delivery mode in settings and emails start flowing through your provider.

Multi-Tenant

Isolated servers per app or environment. Each server gets its own API keys, templates, and activity feed.

Templates

Create reusable email templates with {{variable}} placeholders. Send by alias with a model.

Activity Feed & Stats

Full delivery timeline for every message. Filter by server, status, or tag. Track daily volume and delivery rates.

How It Works

Create a Server

Each app or environment gets its own server. Starts in sandbox mode — every email is captured for inspection.

Send via API

Generate an API key and POST /v1/email/send with your X-Server-Token header.

Go Live

When ready, switch to live mode and configure your email provider. Same API, real delivery.

Quick Start

terminal

curl -X POST https://mail.fastflowtech.ai/v1/email/send \
  -H "Content-Type: application/json" \
  -H "X-Server-Token: ffm_your_api_key" \
  -d '{
    "from": "[email protected]",
    "to": "[email protected]",
    "subject": "Welcome!",
    "htmlBody": "<h1>Hello!</h1><p>Welcome aboard.</p>"
  }'

Ready to send your first email?

Get Started