FAQ
Short answers about price, providers, SmartScreen, privacy, languages and what Komorebi deliberately does not do.
On this page
Is Komorebi free?
Yes. It is free and open source under GPL-3.0-or-later, with no ads, no paid tier and no account to create.
Which email providers work?
Any provider that offers IMAP and SMTP with a password or an app password, over TLS or STARTTLS. Purelymail and Postale.io have built-in settings, and any other server can be set up by hand. See Adding an account.
Does it work with Gmail or Outlook.com?
Komorebi has no OAuth sign-in, and Gmail and Microsoft 365 sign-in are outside the project's scope. Accounts that only allow OAuth for IMAP and SMTP will not work.
Why does Windows SmartScreen warn about the installer?
The installer is not Authenticode-signed yet, so SmartScreen does not recognise it. Check the SHA-256 published with the release (how), then choose More info and Run anyway. An application to SignPath Foundation for free code signing is in progress; see the code signing policy.
Does Komorebi send anything to its developers?
No. There is no telemetry, no analytics and no crash upload, and there is no Komorebi server. The only request that is not to a server you set up is the update check to GitHub. See Privacy and what leaves your computer.
Where are my passwords?
In Windows Credential Manager, never in Komorebi's files.
Can I encrypt my mail on disk?
Yes: Settings > Privacy > Encrypt the mail cache on this computer. See the encrypted cache.
Which languages does it speak?
English and European Portuguese. It follows the Windows display language, and Settings > General > Language can pin one.
Does it run on Windows on ARM, macOS or Linux?
Releases are built for Windows 10 and 11 on x64. There are no builds for other systems.
Can Komorebi decrypt S/MIME or PGP mail?
No. Encrypted mail is shown as encrypted, and the encrypted part can be saved as a file for a program that has the key.
Will it get AI features?
No. AI features and telemetry are explicit non-goals of the project.
Where do I report a problem?
On GitHub Issues. The opt-in diagnostics log (Settings > Privacy) holds only command names, codes and timings, never mail, so it is safe to look at before you share it.