Prospect Mail

Prospect Mail 1.2.1

Unofficial desktop client for Microsoft Outlook

  • By Julian Alarcon
  • Open Source
  • Updated Feb 19, 2026
Download for Windows

About Prospect Mail

Unofficial desktop client for Microsoft Outlook

What's new in 1.2.1

What's Changed
🐛 Bug Fixes
- #392 stop showing window when there is a new message (15dcfad)
📚 Documentation
- improve contributing (2bc757d)
Full Changelog: v1.2.0...v1.2.1

Full release notes »

Technical details

PublisherJulian Alarcon
Version1.2.1
Release date2026-02-19
LicenseMIT
Installer typenullsoft, wix
Architecturex86, x64, arm64
Package IDJulianAlarcon.ProspectMail

Install Prospect Mail from the command line

Install with Windows Package Manager
winget install --id=JulianAlarcon.ProspectMail -e
Update to the latest version
winget upgrade --id=JulianAlarcon.ProspectMail -e
Uninstall
winget uninstall --id=JulianAlarcon.ProspectMail -e
Silent install with the offline installer
msiexec /i "Prospect-Mail-1.2.1.msi" /quiet /norestart
Uninstall the MSI package
msiexec /x {BB2F159B-7EE7-4BA1-B371-6BA0F48B78BF} /quiet

electronhacktoberfestlinuxmacosmicrosoft365office365outlookoutlook-desktop-client

Prospect Mail version history

0.5.4 Aug 14, 2024

What's Changed
- fix: updated link for donations by @julian-alarcon in #338
Full Changelog: v0.5.3...v0.5.4

0.4.0.0

Frequently asked questions

Is Prospect Mail free?

Yes. Prospect Mail is free and open-source software released under the MIT license.

What is the latest version of Prospect Mail?

The latest version is 1.2.1, released on Feb 19, 2026.

Is it safe to download Prospect Mail?

The download button links to the official installer published on github.com, the same file Windows Package Manager installs. You can verify the downloaded file by comparing its SHA-256 checksum with faddb6a4b6b252db7ac8012dfb9a2a20318c8ae2bf3bebfcc67c088d4fafa7df.

Which Windows versions does Prospect Mail support?

Prospect Mail runs on Windows and is available for 32-bit (x86), 64-bit (x64), ARM64 systems.

How do I install Prospect Mail silently?

Run the offline installer with msiexec /i "Prospect-Mail-1.2.1.msi" /quiet /norestart, or install it with Windows Package Manager: winget install --id=JulianAlarcon.ProspectMail -e --silent.

How do I uninstall Prospect Mail?

Open Settings › Apps › Installed apps, find Prospect Mail and select Uninstall. From the command line, run winget uninstall --id=JulianAlarcon.ProspectMail -e.

Alternatives to Prospect Mail

Other Client Communication programs for Windows from different developers.