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Ratatoskr

Ratatoskr is a self-hosted webmail client for any IMAP/SMTP account.

  • Communication
  • Network Services
  • Productivity
Ratatoskr is a self-hosted webmail client for any IMAP/SMTP account. One container, configured by environment variables, with data in SQLite under /data. Features: unified inbox, conversations, Web Push notifications and PWA, snooze, and dark mode. Every email is treated as hostile: server-side sanitising, sandboxed rendering, and remote images are proxied. REQUIRES HTTPS through a reverse proxy (SWAG, Nginx Proxy Manager, Traefik, Caddy) for push notifications and installing it as an app. WebSockets on /api/ws must be proxied. Set the Base URL to the public https address and keep Trust Proxy enabled.

Platform availability

Available on 1 of 9 platforms

  • Unraid
  • TrueNAS (not listed)
  • Umbrel (not listed)
  • ZimaOS (not listed)
  • Proxmox (not listed)
  • Helm (not listed)
  • Mac (not listed)
  • Windows (not listed)
  • Linux (not listed)

Health score?A 0-100 score computed nightly from four factors: maintained (40%: recent commits and steady activity), popular (25%: GitHub stars, log scale), easy to install (20%: platforms, install notes, setup guides, Docker image) and light to run (15%: minimum RAM, ARM support). When the source code has been checked, a fifth factor, security check (20%: automated scan for committed secrets, unsafe desktop-app settings, known-vulnerable dependencies and project hygiene; any serious finding caps it at 20), is added. Factors without data are left out and the rest are rescaled.

40/100 Fair

Maintained
75last commit 0 days ago
Popular
00 GitHub stars
Easy to install
201 install platform, Docker image
Light to run
No data

Based on 3 of 4 factors.

Availability: platform listings confirmed today

GitHub stars
0
Open issues
0
Last commit
2026-10-23
Latest release
v0.1.0
License
AGPL-3.0
Activity
rising

Checked today - source: GitHub (magnuspihl/Ratatoskr)

Resources & Compatibility

Requirements not published yet.

Checked today - source: Docker Hub image tags and published docs

First-install notes

No first-install notes yet.

Alternatives

No alternatives collected yet.

Common questions

What data does Ratatoskr store on its volume?

It stores users, encrypted account settings, preferences, push subscriptions, notified inbox UIDs, and snooze state in one SQLite file. It also keeps an encrypted disposable cache of the newest INBOX and Sent mail in a second SQLite file.

Can one Ratatoskr user connect more than one IMAP/SMTP account?

Yes, each user can add several IMAP/SMTP accounts with separate host, port, TLS, credentials, SMTP settings, and display name. Connections are tested when saved, and passwords are encrypted at rest.

How are remote images and contact pictures handled?

Remote email images are blocked by default and are only fetched and embedded server-side if the user loads them, so the sender does not see the reader’s IP. Contact pictures from Gravatar, Libravatar, or website icons are also fetched server-side and can be turned off.

Does the Docker setup require Redis, PostgreSQL, or other sidecars?

No, it is one container configured by environment variables with a volume for SQLite files. It does not require Redis, Postgres, or sidecars.

What reverse proxy settings are required for push notifications and app install?

It requires HTTPS through a reverse proxy, with WebSockets on /api/ws proxied. The Base URL should be set to the public https address and Trust Proxy should stay enabled.

Answers sourced from github.com

Community

No community discussions collected yet.