OpenInbox 1.0.0

The first public release of OpenInbox with free, self-hosted business email on your own domains, running entirely in your own free Cloudflare account.

One Worker and one D1 database, deployed with a single click. No servers to run, no per-seat fees, and your mail stays in your account.

Highlights

• Receive on any domain in your Cloudflare account. Email Routing and DNS are set up for you.
• Send through Resend, Brevo, Mailjet or SMTP, with automatic fallback when a provider hits its free limit.
• A full web inbox: threads, All Mail, search, labels, filters, snooze, scheduled and undo send, a command palette, dark mode and a mobile layout.
• Teams: unlimited users, personal and shared inboxes, aliases, plus addressing and catch-all.
• Admin dashboard: traffic, free-tier usage, domain health with one-click repair, mail flow and audit logs.
• Safe by default: sanitized and sandboxed HTML mail, remote images blocked until allowed, SPF/DKIM/DMARC checks, optional two-factor sign-in, and encrypted credentials.

Get started

Click Deploy to Cloudflare in the README and follow the setup page. It takes a few minutes. You need a free Cloudflare account with a domain on it, and a free account with a sending provider if you want to send.

Beta

This is an early release. It may have bugs and needs wider testing, so try it on a spare domain first and keep your recovery key safe. Bug reports, testing and pull requests are very welcome in Issues.