ElectronMail is an Electron-based unofficial desktop client for ProtonMail. The app aims to provide enhanced desktop user experience enabling features that are not supported by the official in-browser web clients. It is written in TypeScript and uses Angular.
The download page with Linux/OSX/Windows installation packages is here.
Some Linux package types are available for installing from the repositories (
Snap packages are being maintained by @joshirio):
⚙️Reproducible builds. See details in #183.
⚙️Cross platform. The app works on Linux/OSX/Windows platforms. Binary installation packages located here.
📦Offline access to the email messages (attachments content not stored locally, but emails body content). The local store feature enables storing your messages in the encrypted
database.binfile (see FAQ for file purpose details). So the app allows you to view your messages offline, running full-text search against them, exporting them to EML/JSON files. etc. Enabled since v2.0.0 release.
📫Multi accounts support including supporting individual API entry points. For example, you can force the specific email account added in the app connect to the email provider via the Tor only by selecting the
https://protonirockerxow.onion/API entry point in the dropdown list and configuring a proxy as described in this message.
🔓Automatic login into the app with a remembered the system keychain remembered master (keep me signed in feature). Integration with as a system keychain is done with the keytar module. By the way, on Linux KeePassXC implements the Secret Service interface and so it can be acting as a system keychain (for details, see the "automatic login into the app"-related point in the FAQ).
🔓Persistent email account sessions. The feature introduced since v4.2.0 version with the
experimentallabel, #227. The feature enables the scenario when you to enter the account credentials on the login form only once, manually or automatically by the app, and then you never see the login form anymore for this email account even if you restart the app (unless you explicitly dropped the session in the admin area or it got dropped by the service due to the inactivity/expiration). If this feature is enabled for the account, manual credentials filling is the preferred option as a more secure option since you don't save the account credentials anywhere (
credentialsare encrypted though even if saved, see
settings.binfile description in the FAQ).
🔐Encrypted local storage with switchable predefined key derivation and encryption presets. Argon2 is used as the default key derivation function.
📦Batch emails export to EML files (attachments can optionally be exported in
online / livemode, not available in
offlinemode since not stored locally). Feature released with v2.0.0-beta.4 version, requires local store feature to be enabled.
🌔Dark mode support. See details in #242.
⚙️Starting minimized to tray and closing to tray opt-out features.
🔔Native notifications for individual accounts clicking on which focuses the app window and selects respective account in the accounts list.
You got it here.
How to build your own installation package from source code
Building on Continuous Integration server
The reproducible builds idea is respected by the project. So the simplest way to prepare your own installation package from the source code is to clone the project. The respective GitHub Actions CI config file comes with the project.
- Regardless of the platform you are working on, you will need to have Node.js v15 installed. You might want to use Node Version Manager to be able to switch between the Node.js versions:
- Install NVM.
nvm install 15.
nvm use 15.
- Make sure you are using
npmv7+, not the v6 (run
npm -vto see the version).
- Some native modules require compiling process to be involved and for that Python and C++ compiler need to be installed on the system:
Windows: the simplest way to install all the needed stuff on Windows is to run
npm install --global --production windows-build-toolsCLI command.
makeand a C/C++ compiler toolchain, like
GCCare most likely already installed. Besides keytar needs
libsecretlibrary to be installed.
pythonand Xcode need to be installed. You also need to install the
Command Line Toolsvia Xcode, can be found under the
Xcode -> Preferences -> Downloadsmenu.
- ProtonMail's WebClient requires addition environment setup if you run Windows, see.
- Clone this project to your local device. If you are going to contribute, consider cloning the forked into your own GitHub account project.
- Install Yarn.
- Install dependencies running
- Build app running
yarn run app:dist.
- Build a package to install running
npm run electron-builder:distcommand to build Windows/Mac OS X package and one of the following commands to build Linux package:
npm run electron-builder:dist:linux:appimage
npm run electron-builder:dist:linux:deb
npm run electron-builder:dist:linux:freebsd
npm run electron-builder:dist:linux:pacman
npm run electron-builder:dist:linux:rpm
npm run electron-builder:dist:linux:snap
- The assembled installation package comes into the
To recap, considering that all the described build requirements are met, the short command to build let's say Arch Linux package will be
yarn --pure-lockfile && yarn app:dist && npm run electron-builder:dist:linux:pacman.
Data/config files created and used by the app
If you want to backup the app data these are only files you need to take care of (files localed in the settings folder):
config.jsonfile keeps config parameters. There is no sensitive data in this file, so unencrypted.
settings.binfile keeps added to the app accounts including credentials if a user decided to save them. The file is encrypted with 32 bytes length key derived from the master password.
database.binfile is a local database that keeps fetched emails/folders/contacts entities if the
local storefeature was enabled for at least one account. The file is encrypted with 32 bytes length key randomly generated and stored in
settings.bin. The app by design flushes and loads to memory the
database.binfile as a whole thing but not like encrypting only the specific columns of the database. It's of course not an optimal approach in terms of performance and resource consumption but it allows keeping the metadata hidden. You can see some details here.
database-session.binfile is being used in the same way and for the same purpose as
database.binbut it holds the current session data only. The data from this file will be merged to the
database.binon the next app unlocking with the master password.
session.binfile holds the session data of the email accounts. The file is used if the
Persistent Sessionfeature is enabled for at least one account (the feature introduced since v4.2.0 version with
experimentallabel, #227). The file is encrypted with 32 bytes length key randomly generated and stored in
log.logfile keeps log lines. The log level by default is set to
Removing the app
It's recommended to perform the following actions before uninstalling the app:
- If you had the
Keep me signed infeature enabled (see screenshot), click
Log-outaction in the app menu (see screenshot). That will remove locally stored master password (done with node-keytar). You can also remove it having the app already uninstalled, but that would be a more complicated way as you will have to manually edit the system's keychain.
- Remove settings folder manually. You can locate settings folder path clicking
Open setting folderapp/tray menu item (see screenshot) or reading