KyPostYour server
Connect the mailbox you already use. Credentials, rules, contacts, and local classification stay on infrastructure you choose.
Open beta · self-host today
One inbox.
One inbox.
Every device.
Your infrastructure.
Run KyPost alongside your existing mailbox, then pair native apps for Android, iPhone, Mac, and Linux. Your server coordinates your devices, local AI sorts your inbox, and end-to-end encrypted messages are decrypted only on enrolled devices.
Open source · Existing IMAP/SMTP account · No advertising telemetry
Why KyPost
Control without giving up convenience
Your devices
Pair once with a QR code. Each device receives a separate credential that you can revoke without disrupting the others.
Your keys
End-to-end encrypted messages are decrypted on enrolled devices—not by the KyPost relay.
Three steps
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From Docker to inbox
Install
Run KyPost Server with Docker and connect it to your IMAP and SMTP provider.
Pair
Scan the server QR code from each native client. Mailbox credentials remain on the server.
Choose
Enable device encryption, MFA, local sorting, push delivery, and privacy options at your pace.
Explore the architecture
Inspect KyPost’s components, data flows, security boundaries, and performance in the interactive architecture map.
Available clients
Native where you need it
Android and Linux are in open beta. The Apple client is currently testing. Webmail is included with the server.
- AndroidOpen beta
- LinuxOpen beta
- macOS & iOSTesting
- WebIncluded