There's certainly room for other entries into the open source Android email client space (or for improving the ones above)-motivated developers, take notice. You can download FairEmail on Fossdroid a Google Play version is available for people interested in testing the software. It's licensed under GPLv3 with source code available on GitHub.
It supports multiple accounts and identities, message threading, encryption, and more. FairEmailįairEmail takes a minimalistic approach to mobile email, focusing on reading and writing messages-without all the bells and whistles that risk slowing your email client. InboxPager is licensed under GPLv3 with source code available on GitHub, and it can be installed via F-Droid. (Fortunately, InboxPager offers Gmail instructions.) It also supports OpenPGP encryption through the OpenKeychain application. InboxPager allows you to send and read email messages over the SSL/TLS protocol, which means you may need to do some tweaking if your email provider (e.g., Gmail) doesn't turn that on by default.
You can access the source code (licensed under GPLv3) from GitLab and find documentation on the app's website. Download p≡p for free on Fossdroid or for a nominal fee on Google Play. It provides automatic, end-to-end encryption of emails and attachments (provided your recipient also has an encryption solution installed-if not, p≡p warns that your email will be sent without encryption). p≡pĪs its full name, "Pretty Easy Privacy" suggests, p≡p is focused on privacy and secure communications. It's available for download on Google Play, Amazon, and F-Droid.
K-9 is open sourced under the Apache 2.0 License with source code available on GitHub. Its user documentation offers help on installation, setup, security, reading and sending email, and much more. It has support for IMAP and WebDAV, multiple identities, attachments, emojis, and other typical email client features.
K-9 Mail has been around almost as long as Android has-it originated out of a patch to the Android 1.0 email client.
(See below for specific download details for each.) K-9 Mail Two are available in the official Android app store, Google Play, and you can find them in one of the open source Android app repositories, Fossdroid or F-Droid. We've uncovered four open source email clients for Android for you to consider.