# Robotomail — Email Infrastructure for AI Agents

> Email inboxes your AI agents own.

Paste one line to your agent and it signs itself up, creates a mailbox, and starts sending email. No dashboard, no SMTP, no mail server ops.

- [Get started](https://robotomail.com/sign-up?plan=developer&period=monthly)
- [Agent skill page](https://robotomail.com/skill) — instructions for agents to self-onboard
- [Sign in](https://robotomail.com/sign-in)

## Features

### API-first email
RESTful endpoints for every operation. Create mailboxes, send messages, manage threads — all through clean JSON.

### Real-time inbound
Get notified the instant email arrives — via webhooks, SSE event streaming, or polling. HMAC-signed payloads with automatic retries.

### Custom domains
Send from your own domain with auto-configured DKIM, SPF, and DMARC. Guided DNS setup with automatic verification.

### Threaded conversations
Automatic thread resolution via In-Reply-To headers and subject matching. Context preserved across replies.

### File attachments
Upload to secure cloud storage, attach to outbound messages. Presigned download URLs for inbound.

### Usage controls
Per-mailbox daily and monthly send limits, storage quotas, and suppression lists. Stay in control of what your agents send.

## How It Works

01. **Share one URL** — Point your agent at robotomail.com/skill — it reads the page and signs up via API.
02. **Mailbox is ready** — A default mailbox is created at signup — your agent has a real email address immediately.
03. **Send & receive** — Send with a POST. Inbound arrives via webhooks, SSE streaming, or polling.
04. **React & reply** — Parse the event, generate a response, reply. Threading is automatic.

## Pricing

**Developer** — $19/mo: 10 mailboxes, 15,000 emails / month, 500 sends / day per mailbox, 2,000 inbound / month, 1 custom domain, 10 GB storage.

**Growth** — $79/mo: 50 mailboxes, Unlimited monthly sending, 1,000 sends / day per mailbox, 20,000 inbound / month, 5 custom domains, 25 GB storage.

**Scale** — $199/mo: 200 mailboxes, Unlimited monthly sending, 2,000 sends / day per mailbox, Unlimited inbound, Unlimited custom domains, 100 GB storage.

Start free with a card-free 3-day trial. 30-day money-back guarantee on paid plans.

## FAQ

### How is this different from SendGrid or Mailgun?
Those are transactional email services for humans. Robotomail gives AI agents their own mailboxes with real addresses — they can send and receive email autonomously, not just fire-and-forget.

### Can my agent sign up without a browser?
Yes. One POST to /v1/signup creates an account and returns an API key. Point your agent at robotomail.com/skill and it can onboard itself end-to-end.

### How does the 30-day money-back guarantee work?
Every paid plan is covered. If you're not happy within 30 days of your first paid charge, request a full refund via the in-app contact support button. We honour all valid and legal requests; the only exception is accounts that have violated the Acceptable Use Policy.

### Do you support custom domains?
Yes. Add your domain, configure the DNS records we generate (MX, SPF, DKIM, DMARC), and we verify automatically. Available on paid plans (Developer and above).

### How does inbound email work?
Three ways. Register a webhook for real-time push, connect to the SSE event stream (GET /v1/events) for real-time pull without a public URL, or poll GET /v1/mailboxes/:id/messages on your own schedule.

### Is email delivery reliable?
We auto-configure DKIM, SPF, and DMARC for every domain. Each mailbox has its own send limits and suppression list to protect your sender reputation.

### Why not just use the Gmail or Outlook API?
Their ToS prohibit automated use by bots. You can't programmatically provision mailboxes, rate limits are restrictive, and costs scale badly. Robotomail is built for agents from the ground up — create a mailbox with one API call, no OAuth dance, no per-user seats.