Keep your provider
KyPost sits between your existing IMAP and SMTP mailbox and your devices. You do not have to become a mail-delivery operator to use it.
← All apps
Your mailbox.
KyPost / Email
Your mailbox.
Your devices.
Your server.
Keep the mailbox you already use, with a private hub that connects your devices and puts you in control of your email.
Open source (MIT) · Open betaScreenshots
See it in use.
Inside KyPost
Built with a purpose.
Devices never see your password
Scan a QR code from Security, then Devices, in the web app; each code expires after 90 seconds. Every device gets its own credential in the platform keystore. Lose a phone, revoke the phone.
Sorting stays home
Filter rules, contacts and the classifier that sorts your inbox run on your server. By default nothing about your mail leaves it for a cloud model.
End-to-end when you want it
Encrypted mail is decrypted only on the devices you enroll. The server and the push relay never hold the key.
One option at a time
Turn on device encryption, multi-factor sign-in, local sorting and push delivery when you are ready, not all at once.
Signed downloads
Client builds are signed and every download ships with a digest you can check before installing.
How it fits together
Know where the pieces live.
- Existing IMAP / SMTP mailbox
- KyPost on your server
- Web browser & paired clients
- Server · Open beta
- Docker Compose on any Linux host. The quick start covers the environment file, first sign-in and connecting your mailbox.
- Web · Included
- Ships with the server. Open your server’s address in any browser to read mail, pair devices and change settings.
- Android · Open beta
- A signed APK on every tagged release, with a SHA-256 digest beside it. Play Store and F-Droid listings are coming.
- Linux · Open beta
- A Flatpak for KDE Plasma and Plasma Mobile from KyPost’s own signed remote, for x86_64 and aarch64.
- iPhone and Mac · Testing
- Coming to the App Store. Until then, build from source with Xcode and pair it like any other device.
Before you get started
Your server stores mailbox credentials and mail data. Its operator is responsible for access, updates and backups. Notification providers may process delivery data when enabled.
Read the KyPost privacy policy. For data on an independently operated installation, contact its operator.
Next step
Take a closer look.
The project documentation is the place for current requirements and instructions.