Unofficial desktop client for Microsoft Outlook
Publisher’s description
What is Prospect Mail?
Prospect Mail by Julian Alarcon is open-source Windows software in the email clients category. It ranks 10th by popularity among email clients in this catalogue. It is written in JavaScript.
Installation and requirements
The publisher provides MSI and EXE (NSIS) installers for 64-bit, ARM64 and 32-bit Windows. A silent install is possible with the installer’s documented switches. An MSI package is available for deployment with Group Policy, Intune or Configuration Manager.
Updates and version history
The current version is 1.2.1, released on February 19, 2026. The version history goes back to October 11, 2022: 3 releases, all linked to the official files. That is about 0.9 releases a year.
Popularity and file types
The Chocolatey package has been downloaded 592 times. The source code on GitHub (julian-alarcon/prospect-mail) has 544 stars. Similar programs include Mailspring, Tuta Mail and Proton Mail Bridge.
Project description on GitHub: “Prospect is an Outlook mail desktop client powered by Electron”
Pros / Cons
Pros
- Open source: the code can be inspected and built by anyone
- Native ARM64 build for Windows on Arm
- MSI package for managed deployment
- Documented silent install
In short: Prospect Mail is an open-source email client tool for 64-bit, ARM64 and 32-bit PCs. Administrators can deploy it unattended.
Is Prospect Mail safe to download?
- The file is served by github.com, the publisher’s own domain
- The download link uses HTTPS
- A SHA256 hash is published, so you can verify the file:
FADDB6A4B6B252DB7AC8012DFB9A2A20318C8AE2BF3BEBFCC67C088D4FAFA7DF· Open the VirusTotal report for this hash - The link has not been checked yet
- The source code is public
- ExeAtlas does not host, wrap or modify installers
Related guide: How to check a file’s SHA256 hash on Windows
Recent versions
All 3 versions ›3 versions over 3 years · about 0.9 a year
| Version | Date | Size | Files |
|---|---|---|---|
| 1.2.1Latest | February 19, 2026 | — | 32-bit EXE (NSIS)ARM64 MSI64-bit MSI |
| 0.5.4 | August 14, 2024 | — | 64-bit MSI64-bit EXE (NSIS) |
| 0.4.0.0 | October 11, 2022 | — | 64-bit EXE (NSIS)64-bit MSI |
Install from the command line
Silent install ›winget install --id JulianAlarcon.ProspectMail -echoco install prospect-mail -ymsiexec /i Prospect-Mail-1.2.1.msi /qn /norestartmsiexec /x {BB2F159B-7EE7-4BA1-B371-6BA0F48B78BF} /qn /norestartRelated guide: How to use winget: install and update apps
Information
- Publisher
- Julian Alarcon
- Category
- Email clients
- Licence
- MIT
- Price
- Free
- Source code
- github.com/julian-alarcon/prospect-mail
- Written in
- JavaScript
- Requires
- Windows 11 / 10
- Architecture
- 64-bit, ARM64, 32-bit
- Installer
- MSI, EXE (NSIS)
- Version
- 1.2.1
- Released
- February 19, 2026
- Added to the catalogue
- October 11, 2022
- Versions listed
- 3
- Updates / year
- 0.9
- Chocolatey downloads
- 592
- GitHub stars
- 544
- GitHub forks
- 79
- Website
- github.com
- winget ID
- JulianAlarcon.ProspectMail
- Chocolatey package
- prospect-mail
- MSI product code
- {BB2F159B-7EE7-4BA1-B371-6BA0F48B78BF}
Ratings and reviews
No reviews yet. Be the first to rate it.
Alternatives to Prospect Mail
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Mailspring1.26.2Boost your productivity and send better email with Mailspring, the best mail client for Mac, Linux, and Windows.Open source7.7K ↓ -
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eM Client11.0.1054Fast email client with full Gmail, Hotmail and other services synchronisation. Best replacement for MS Outlook or Thunderbird. Free version for Home users.Free98.1K ↓ -
MFCMapi26.0.26291.01Provides access to MAPI stores to facilitate investigation of Exchange and Outlook issues and to provide developers with a sample for MAPI development.Open source5.7K ↓ -
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Open source44.3K ↓ - Mozilla Thunderbird (en-US)158.0.1Thunderbird is a free email application that is easy to set up and customize - and it's loaded with great features!Open source
Frequently asked questions
Is Prospect Mail free?
Yes. Prospect Mail is open-source software under the MIT licence.
Is Prospect Mail safe to download?
The download comes from github.com, which belongs to the publisher; ExeAtlas does not host or change the file. Compare its SHA256 hash with the one shown here, or open the VirusTotal report for that hash.
How do I install Prospect Mail with winget?
Open PowerShell or Windows Terminal and run the winget command shown on this page. winget downloads the official installer and checks its SHA256 hash before running it.
Can Prospect Mail be installed silently?
Yes. The silent install page lists the exact command for each installer, including msiexec for the MSI package.
Does Prospect Mail run on ARM (Windows on Arm)?
Yes, there is a native ARM64 installer.
Where can I download an older version of Prospect Mail?
The versions page lists all 3 versions with links to their official installer files, back to October 11, 2022.
What are alternatives to Prospect Mail?
Mailspring, Tuta Mail, Proton Mail Bridge, eM Client and MFCMapi. The alternatives page compares them.
