Unofficial email Outlook client using Electron. It uses the Web App and wraps it as a standalone application using Electron. This only works for Microsoft/Office 365 accounts, don't use it for personal Outlook.com accounts.
Available for Linux, Windows (10+) and macOS.
This project has NO DIRECT AFFILIATION with Microsoft, Microsoft 365 or any product made by Microsoft.
The application can be downloaded from release page.
Select the appropriated file depending on your OS:
- Windows:
.exefile or.msifile - macOS:
.dmgfile - Linux: Multiple artifacts are available, please choose your needed one
(
AppImage,deb,flatpak,pacman,rpm,snap,tar.gz) depending on your Linux Distribution.
Just double-click and follow the Installer steps.
Double-click the dmg file and drag the blue Prospect Mail icon to the App
folder
Snap builds are available in the Snap Store.
Or use sudo snap install prospect-mail from the terminal.
Arch Linux has a community published artifact available in AUR here.
For other distributions please follow your specific steps.
- Check your Outlook Microsoft 365 emails/calendar from the desktop app
- Close to minimize
- Start minimized: toggle via tray icon Settings menu, or use command-line
flag
prospect-mail --minimized - Dock tray support
- System notification
- Connect to standard or custom Outlook URL
- Spellcheck using native Outlook MS Editor
- Visualize files (pdf) in emails
Via tray menu settings.json can be opened and edited. After every save you
need to click in "Reload settings" to apply changes.
{
"urlMainWindow": "https://outlook.office.com/mail",
"urlsInternal": [
"outlook.live.com/mail/deeplink",
"outlook.office365.com/mail/deeplink",
"outlook.office.com/mail/deeplink",
"outlook.office.com/calendar/deeplink",
"to-do.office.com/tasks"
],
"urlsExternal": [
"outlook.live.com",
"outlook.office365.com",
"outlook.office.com"
],
"safelinksUrls": [
"outlook.office.com/mail/safelink.html",
"safelinks.protection.outlook.com"
],
"showWindowFrame": true,
"hideOnClose": true,
"hideOnMinimize": true,
"startMinimized": false,
"customBrowserPath": "microsoft-edge"
}| Setting | Description | Default |
|---|---|---|
urlMainWindow |
Main Outlook service URL to load | https://outlook.office.com/mail |
urlsInternal |
Array of URL patterns for deeplinks that open in new app windows | See example above |
urlsExternal |
Array of URL patterns for Outlook/Microsoft 365 services that open in the main window | See example above |
safelinksUrls |
Array of URL patterns for Microsoft Safe Links that open in external browser | See example above |
showWindowFrame |
Show/hide window frame and title bar | true |
hideOnClose |
Minimize to tray instead of quitting when closing window | true |
hideOnMinimize |
Hide to tray when minimizing window | true |
startMinimized |
Start app minimized to tray (also available via tray menu or --minimized flag) |
false |
customBrowserPath |
Custom browser for external links. Use command name (e.g., "firefox") or full path |
System default |
This configuration will let you use Prospect with personal Outlook.com account:
Warning
Please notice that Prospect Mail is only tested in Work/Educational accounts and no issues will be reviewed on use for personal accounts.
{
"urlMainWindow": "https://login.live.com/login.srf",
"urlsInternal": ["outlook.com", "live.com"],
"urlsExternal": ["outlook.com", "live.com"]
}The main software architecture components and their versions are this:
- Node.js version: 22.x LTS
- npm (comes with Node.js)
- electron version: 39.x
- electron-builder version: 26.x
- electron-store version: 8.2.0
Clone the repository and run in development mode. (You need to have git and node installed)
git clone https://github.com/julian-alarcon/prospect-mail.git
cd prospect-mail
npm install
npm startNote: If you encounter a sandbox error on Linux, run:
ELECTRON_DISABLE_SANDBOX=1 npm start. See
CONTRIBUTING.md for details.
Build the application for Linux
npm run dist:linuxThis will build an AppImage, deb, flatpak and snap files in the dist folder. These files can be run in most popular Linux distributions.
You can specify a specific build type:
npm run dist:linux:snap
npm run dist:linux:flatpak
npm run dist:linux:appimageBuild the application for Mac (It works in versions 10.14 and 10.15)
npm run dist:macBuild it for windows:
npm run dist:windowsOnce it has been built, or using the release files available, you can install the files using:
- AppImage: Follow the AppImage process
- Deb:
sudo dpkg -i prospect-mail_x.y.z_arch.deb - Snap:
sudo snap install dist/prospect-mail_x.y.z_arch.snap --dangerous - Flatpak:
flatpak install --user dist/prospect-mail_x.y.z_arch.flatpak
Contributions are welcome! Please see CONTRIBUTING.md for guidelines on how to contribute to this project, including development setup, coding standards, and the release process.
MIT by Julian Alarcon based on electron-outlook by Howard J
