Email android app source

FairEmail

Fully featured, open source, privacy oriented email app for Android

FairEmail is easy to setup and works with virtually all email providers, including Gmail, Outlook and Yahoo!

FairEmail might be for you if you value your privacy.

FairEmail does not support non-standard protocols, like Microsoft Exchange Web Services and Microsoft ActiveSync.

Main features

• Fully featured
• 100 % open source
• Privacy oriented
• Unlimited accounts
• Unlimited email addresses
• Unified inbox (optionally accounts or folders)
• Conversation threading
• Two way synchronization
• Offline storage and operations
• Battery friendly
• Low data usage
• Small (

20 MB)

Material design (including dark/black theme)

Maintained and supported

This app is deliberately minimalistic by design, so you can concentrate on reading and writing messages.

This app starts a foreground service with a low priority status bar notification to make sure you’ll never miss new emails.

Privacy features

• Encryption/decryption supported (OpenPGP and S/MIME)
• Reformat messages to prevent phishing
• Confirm showing images to prevent tracking
• Confirm opening links to prevent tracking and phishing
• Attempt to recognize and disable tracking images
• Warning if messages could not be authenticated

Simple

• Quick setup
• Easy navigation
• No bells and whistles
• No distracting «eye candy»

Secure

• No data storage on third party servers
• Using open standards (IMAP, SMTP, OpenPGP, S/MIME, etc)
• Safe message view (styling, scripting and unsafe HTML removed)
• Confirm opening links, images and attachments
• No special permissions required
• No advertisements
• No analytics and no tracking (error reporting is opt-in)
• No Google backup
• FairEmail is an original work, not a fork or a clone

Efficient

• Fast and lightweight
• IMAP IDLE (push messages) supported
• Built with latest development tools and libraries

Pro features

All pro features are convenience or advanced features.

• Account/identity/folder colors
• Colored stars (instructions)
• Notification settings (sounds) per account/folder/sender (requires Android 8 Oreo) (instructions)
• Configurable notification actions
• Snooze messages (instructions)
• Send messages after selected time
• Synchronization scheduling (instructions)
• Reply templates
• Accept/decline calendar invitations
• Add message to calendar
• Filter rules (instructions)
• Automatic message classification (instructions)
• Search indexing (instructions)
• S/MIME sign/encrypt (instructions)
• Biometric/PIN authentication (instructions)
• Message list widget
• Export settings

Whichever features are chosen as pro features, there is always someone who complains that a feature should be free. Please don’t be that person.

Privacy

Please see here for the privacy policy.

Support

Please see here for a list of often asked questions and about how to get support.

Screenshots

Setup

Navigation

Messages — light

Messages — black 1

Messages — compact

Conversation

Folders

Folders — compact

Compose

Widget 2

1. There are a number of themes to choose from: blue/orange, yellow/purple, red/green, grey, black and black and white. The colors of the colored themes can be reversed and there are variants with a light, dark and black background.
2. The account, folder, transparency and background color of the widget can be selected

Copyright © 2018– 2021 by Marcel Bokhorst (M66B)

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5 Best Open Source Android Email Clients

I used to live in the Google PlayStore and apparently not many things have changed in the area of email client applications; most of them are closed-source and the best are among the paid titles.

I took it upon myself to check for the top open-source email client apps for Android devices and here is my list in no particular order.

1. K-9 Mail

K-9 Mail is a lightweight community-developed app that has been around for such a long time it supports most IMAP, POP3, and Exchange 2003/2007 accounts. It includes all the features you want in any email client including multi-folder sync, BCC-self, flagging, IMAP push email, signatures, filing, and privacy.

All of its features are not self-explanatory so be sure to make use of its documentation to forge ahead.

2. InboxPager

InboxPager is a Java application that supports pop, smtp, and imap protocols via SSL/TLS. It features a simple (however, dull) UI with the smooth animation transitions, auto-conversion of texts from UTF-8, OpenPGP messages support, etc.

It is not available in the Google PlayStore so you will have to download it either directly from GitHub or F-droid app store.

InboxPager Email Client

3. FairEmail

FairEmail provides you with a distraction-free Material design UI for composing and replying emails, a unified inbox, folder management, message threading, multiple accounts, etc. Its pro features include a dark theme, account colours, and signatures, among other user options.

FairEmail is security conscious and woks with only encrypted connections. It uses safe message view to prevent analytics and tracking.

The Android app is still in beta stage but you can apply to be a better tester by accepting the invitation in the PlayStore link.

p≡p stands for Pretty Easy Privacy and this email client encrypts all communications in your email without the need for you to create new accounts.

It ensures that no one can intercept your messages by using authenticating your communication partner’s messages and it uses peer-to-peer instead of a central server.

p≡p Email Encryption Client

5. ProtonMail

ProtonMail is among the world’s largest encrypted mail service provides with 2 million + users. It was founded by CERN scientists in 2013 and was even able to create the mobile app thanks to a record-breaking $550,000 donation campaign.

ProtonMail features a beautiful UI, end-to-end encryption, swiss privacy and neutrality, etc. If you want an open-source email client that is completely secure then ProtonMail is your best bet.

ProtonMail is my favorite pick on this list and maybe that is why I kept it for last. What is yours?

Have you got other open-source Android email clients we should know about? Drop your suggestions and comments in the section below.

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4 open source Android email clients

Email is not on its deathbed, but most of it happens on mobile devices now.

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Even though members of the younger generations are trying to bury email as «communication for old people,» the reality is email isn’t anywhere near its deathbed. While collaboration tools, social media, and texting are important, they aren’t ready to replace email as an essential business (and social) communications tool.

Given that email isn’t going away and most of it is now read on mobile devices (according to a host of studies), having a good mobile email client is critical. If you’re an Android user who wants an open source email client, things get a little bit tricky.

K-9 Mail

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. It has support for IMAP and WebDAV, multiple identities, attachments, emojis, and other typical email client features. Its user documentation offers help on installation, setup, security, reading and sending email, and much more.

K-9 is open sourced under the Apache 2.0 License with source code available on GitHub. It’s available for download on Google Play, Amazon, and F-Droid.

As its full name, «Pretty Easy Privacy» suggests, p≡p is focused on privacy and secure communications. 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).

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.

InboxPager

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. (Fortunately, InboxPager offers Gmail instructions.) It also supports OpenPGP encryption through the OpenKeychain application.

InboxPager is licensed under GPLv3 with source code available on GitHub, and it can be installed via F-Droid.

FairEmail

FairEmail 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. It supports multiple accounts and identities, message threading, encryption, and more.

It’s licensed under GPLv3 with source code available on GitHub. You can download FairEmail on Fossdroid; a Google Play version is available for people interested in testing the software.

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. And, if you know of an application we missed, please share it in the comments.

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Email android app source

Fully featured, open source, privacy oriented email app for Android

FairEmail is easy to set up and works with virtually all email providers, including Gmail, Outlook and Yahoo!

FairEmail might be for you if you value your privacy.

FairEmail is an email client only, so you need to bring your own email address.

FairEmail does not support non-standard protocols, like Microsoft Exchange Web Services and Microsoft ActiveSync.

• Fully featured
• 100 % open source
• Privacy oriented
• Unlimited accounts
• Unlimited email addresses
• Unified inbox (optionally accounts or folders)
• Conversation threading
• Two way synchronization
• Push notifications
• Offline storage and operations
• Common text style options (size, color, lists, etc)
• Battery friendly
• Low data usage
• Small (

20 MB)

Material design (including dark/black theme)

Maintained and supported

This app is deliberately minimalistic by design, so you can concentrate on reading and writing messages.

This app starts a foreground service with a low priority status bar notification to make sure you’ll never miss new emails.

• Encryption/decryption supported (OpenPGP and S/MIME)
• Reformat messages to prevent phishing
• Confirm showing images to prevent tracking
• Confirm opening links to prevent tracking and phishing
• Attempt to recognize and disable tracking images
• Warning if messages could not be authenticated

• Quick setup
• Easy navigation
• No bells and whistles
• No distracting «eye candy»

• No data storage on third party servers
• Using open standards (IMAP, POP3, SMTP, OpenPGP, S/MIME, etc)
• Safe message view (styling, scripting and unsafe HTML removed)
• Confirm opening links, images and attachments
• No special permissions required
• No advertisements
• No analytics and no tracking (error reporting via Bugsnag is opt-in)
• No Google backup
• No Firebase Cloud Messaging
• FairEmail is an original work, not a fork or a clone

• Fast and lightweight
• IMAP IDLE (push messages) supported
• Built with latest development tools and libraries

All pro features are convenience or advanced features.

• Account/identity/folder colors
• Colored stars (instructions)
• Notification settings (sounds) per account/folder/sender (requires Android 8 Oreo) (instructions)
• Configurable notification actions
• Snooze messages (instructions)
• Send messages after selected time
• Synchronization scheduling (instructions)
• Reply templates
• Accept/decline calendar invitations
• Add message to calendar
• Filter rules (instructions)
• Automatic message classification (instructions)
• Search indexing (instructions)
• S/MIME sign/encrypt (instructions)
• Biometric/PIN authentication (instructions)
• Message list widget
• Export settings

Please see here for screenshots.

Supported download locations:

• GitHub
• Play store
• Play store (test)
• F-Droid (last build status) (the F-Droid app can be downloaded here)
• AppGallery (the AppGallery app can be downloaded here)
• Amazon (the APK file repackaged by Amazon is incomplete! An issue report was never answered by Amazon.)

Please see this FAQ about the differences between the different releases.

Important: after enrolling in the Advanced Protection Program you cannot use third party email apps anymore, please see this FAQ for more information.

The Gmail quick setup wizard can be used in official releases only (Play store or GitHub) because Google approved the use of OAuth for one app signature only.

Important: Gsuite accounts authorized with a username/password will stop working in the near future. Gsuite accounts authorized with the quick setup wizard (OAuth) will keep working.

To download a GitHub release you might need to expand the assets section to download the APK file.

The GitHub version is being updated more often than the Play store version. The GitHub release will automatically check for updates on GitHub (this can be turned off in the miscellaneous settings).

F-Droid builds new versions irregularly and you’ll need the F-Droid client to get update notifications. To get updates in a timely fashion you are advised to use the GitHub release.

Important: There is support on the F-Droid build only if the version number of the F-Droid build is the same as the version number of the latest GitHub release. Please see here for more information on third-party builds.

Because F-Droid builds and GitHub releases are signed differently, an F-Droid build needs to be uninstalled first to be able to update to a GitHub release.

One line command to display certificate fingerprints:

unzip -p fairemail.apk META-INF/CERT.RSA | keytool -printcert

I do not hand over the signing keys of my apps to Google. Please see this Google blog and this article for more information.

FairEmail requires at least Android 5 Lollipop.

Individual message notifications are available on Android 7 Nougat and later only because earlier Android versions do not support notification grouping.

Notification settings (sounds) per account/folder/sender are available on Android 8 Oreo and later only because earlier Android versions do not support notification channels.

FairEmail will work properly on devices without any Google service installed.

Please see here for known problems.

Please see here for the privacy policy.

Please see here for a list of often asked questions and about how to get support.

Contributions to this document and the frequently asked questions are preferred in the form of pull requests.

• You can translate the in-app texts of FairEmail on Crowdin
• If your language is not listed, please send a message through this contact form

Building FairEmail from source code is straightforward with Android Studio. It is expected that you can solve build problems yourself, so there is no support on building.

Source code contributions are preferred in the form of pull requests. Please contact me first to tell me what your plans are.

Please note that by contributing you agree to the license below, including the copyright, without any additional terms or conditions.

See here for a list of used libraries and associated license information.

Online translations are supported by:

Error reporting is sponsored by:

Bugsnag monitors application stability and is used to help improve FairEmail. Error reporting is disabled by default, see also the privacy policy.

Copyright © 2018-2021 Marcel Bokhorst. All rights reserved.

FairEmail is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

FairEmail is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

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Fully featured, open source, privacy friendly email app for Android

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