# Inbound

> Programmable email infrastructure for sending, receiving, replying, and threading emails via a simple API and TypeScript SDK.

Inbound is a programmable email infrastructure platform that lets developers send and receive emails programmatically using a clean API and TypeScript SDK. You can add your own domain, configure MX records, and instantly get unlimited mailboxes with no per-address setup required. Inbound supports full email threading, webhook delivery under 100ms, and a Resend-compatible API for easy migration.

- **Send Emails** — *Send transactional emails from any address on your domain using the TypeScript SDK or REST API.*
- **Receive Emails via Webhooks** — *Route incoming emails to dedicated endpoints or a catch-all webhook; webhooks are delivered typically under 100ms with exponential backoff retries.*
- **Full Threading Support** — *Reply programmatically and Inbound automatically manages headers so responses appear in the correct thread.*
- **Unlimited Mailboxes** — *Add your domain once and receive at any address on it without configuring each mailbox individually.*
- **Custom Domain Routing** — *Route specific addresses (e.g., support@, billing@) to dedicated API endpoints or set up a catch-all for your entire domain.*
- **Spam Filtering** — *Incoming email is run through spam detection; configure your mailbox to reject, flag, or accept spam.*
- **Resend-Compatible API** — *Migrate from Resend with minimal code changes thanks to a compatible SDK design.*
- **MCP Server Integration** — *Connect Inbound to AI agents and workflows via the built-in MCP server integration.*
- **TypeScript SDK** — *Install via `bun install inboundemail` or npm; full type safety and first-class TypeScript support out of the box.*
- **Better Auth Integration** — *Native integration with Better Auth for authentication workflows.*

## Features
- Send transactional emails via API
- Receive emails via webhooks
- Full email threading support
- Unlimited mailboxes per domain
- Custom domain routing
- Catch-all webhook routing
- Spam filtering and detection
- Resend-compatible API
- TypeScript SDK
- MCP Server integration
- Better Auth integration
- Exponential backoff webhook retries
- Real-time email delivery

## Integrations
MCP Server, Better Auth, Custom domains (MX records), Resend (compatible API)

## Platforms
API, DEVELOPER_SDK

## Pricing
Subscription-based

## Links
- Website: https://inbound.new
- Documentation: https://inbound.new/docs
- Repository: https://github.com/inbound-org
- EveryDev.ai: https://www.everydev.ai/tools/inbound-email