Inbound lets you send and receive emails programmatically. Add your domain, configure your MX records, and you're ready to go. Unlimited mailboxes on that domain, no setup required for each address. Send from any address on your domain. Receive at any address. Route specific addresses to dedicated endpoints, or set up a catch-all that forwards everything to a single webhook. Perfect for support domains that route all incoming mail to an AI agent. Every email preserves threading automatically. Reply programmatically and we handle all the headers so your responses show up in the right thread. It just works.