openresend.devGitHub

Emails in,
webhooks out.

Connect a mailbox, paste a URL, and you are done. Every new email reaches your webhook as clean JSON. No mail server, no parsing, no polling.

View on GitHubHow it works

Three steps. No mail server.

Connect a mailbox, point it at a URL, and every new email arrives as JSON.

  1. Connect a mailbox

    Any IMAP server. OpenResend keeps the connection open and hears new mail the moment it lands.

  2. Add a webhook

    Paste the URL that should receive it. One mailbox can feed many webhooks, and the other way round.

  3. Receive JSON

    Every new email arrives as a POST with its headers, body and attachments, ready to use.

What your webhook receives

Every new email as one JSON request: sender, recipients, subject, date, body and attachments, plus the IDs to thread conversations and skip duplicates.

POST https://api.acme.dev/email200 OK · 182 ms
Content-Type: application/json

{
  "from": {"name": "Ana Ruiz", "address": "ana@client.io"},
  "subject": "Re: Order #4182 arrived damaged",
  "date": "2026-10-17T10:42:03Z",
  "to": [{"name": "Acme Support", "address": "support@acme.com"}],
  "cc": [{"name": "Luis Ruiz", "address": "luis@client.io"}],
  "replyTo": [{"name": "Ana Ruiz", "address": "ana.ruiz@client.io"}],
  "bcc": [],
  "text": "Hi, the package arrived with a broken corner…",
  "html": "<p>Hi, the package arrived with a broken corner…</p>",
  "attachments": [{"filename": "photo.jpg", "contentType": "image/jpeg", "size": 248113}],
  "messageId": "<CAF7x2k9d@mail.client.io>",
  "inReplyTo": "<4182.reply@acme.com>",
  "references": ["<4182@acme.com>", "<4182.reply@acme.com>"],
  "listUnsubscribe": null
}

Built in the open

Today it does one thing: IMAP in, webhooks out. Next it grows into a flow tool for data that comes and goes.

  1. Live

    Working today

    • WorkspacesSign in with Google or GitHub.
    • Flow canvasA visual editor for your flows.

  2. Now

    Building

    • IMAP triggerListens to any IMAP mailbox.
    • Webhook outputSends each email as JSON.
    • Signatures and retriesDeliveries you can verify and trust.

  3. Next

    Routing

    • FiltersRoute by sender, subject or body.
    • Delivery logSee and replay every delivery.
    • Slack and DiscordSend emails straight to chat.
    • DockerSelf-host with one command.

  4. Later

    Platform

    • MCP serverLet AI agents work with your mail.
    • Python SDKVerify and handle webhooks in Python.
    • Gmail and OutlookConnect with OAuth, no passwords.

Two ways to run it

Host it yourself for free, or let us run it for you.

Open source

Free, forever

  • Unlimited mailboxes and webhooks
  • Your mail never leaves your servers
  • Python, PostgreSQL and React
  • AGPL-3.0
View on GitHub

Cloud

Coming soon

  • Nothing to host or update
  • Connections kept alive for you
  • Same project, same payload
  • Priced per email
In the works

Follow the build.

Star the repository to see the IMAP trigger and webhook output land, or open an issue with the integration you need.

Star on GitHubOpen an issue