Shutbox

Plans and prices

Every plan, in full

On the record

Account security

The service supports OPAQUE authentication, optional TOTP two-factor authentication, and WebAuthn passkeys.shutbox.im · read 9 Oct 2026

API

The API uses JSON over HTTPS, and API-key creation is available on paid plans.shutbox.im · read 9 Oct 2026

Custom addresses

Users can bring their own domain or start with an @shutbox.im address and use aliases.shutbox.im · read 9 Oct 2026

Data location

The privacy policy says mail and account data are stored in Nuremberg, Germany, with encrypted database backups in Germany.shutbox.im · read 9 Oct 2026

Domain setup

Shutbox provides MX, SPF, DKIM, and DMARC records for users to publish with their DNS provider.shutbox.im · read 9 Oct 2026

External mail

Outbound mail to other providers is decrypted in memory by a delivery bridge for transmission, while sender, recipient, and timestamp metadata remain unencrypted.shutbox.im · read 9 Oct 2026

Inbox features

The web inbox includes folders, labels, conversations, and search.shutbox.im · read 9 Oct 2026

Internal encryption

For mail between Shutbox accounts, message bodies and attachments are encrypted on the sending device for each recipient.shutbox.im · read 9 Oct 2026

Mobile app

The security disclosure policy lists the Shutbox Android app within its scope.shutbox.im · read 9 Oct 2026

Product

Shutbox is a private email service that is currently in beta.shutbox.im · read 9 Oct 2026

Storage limit

When an account exceeds its storage quota, outbound sending is suspended and inbound mail continues for a 30-day grace period.shutbox.im · read 9 Oct 2026

Support

Dedicated support is included with the Business plan; the security policy says Shutbox is run by one person and does not currently pay vulnerability bounties.shutbox.im · read 9 Oct 2026

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