K-9 Mail appK-9 Mail is Internet tool that is open source under the Apache-2.0 license. K-9 Mail is an open source email client that works with basically every email provider.
* supports multiple accounts
* Unified Inbox
* privacy-friendly (no tracking whatsoever, only connects to your email provider)
* automatic background synchronization or push notifications
* local and server-side search
* OpenPGP email encryption (PGP/MIME)
Install the app OpenKeychain: Easy PGP to encrypt/decrypt your emails using OpenPGP.
If you're having trouble with K-9 Mail, ask for help in our support forum.
Want to help?
K-9 Mail is a community developed project. If you're interested in helping to improve the app, please join us!
You can find our bug tracker, source code, and wiki at https://github.com/thundernest/k-9.
We're always happy to welcome new developers, designers, documenters, translators, bug triagers and friends.