Winmail Viewer - Letter Opener

Winmail Viewer - Letter Opener for PC and Mac

Published by Letter Opener GmbH

  • Compatibility: Available on Windows 11, Windows 10, Windows 7 & MacOS 10, 11, 10.9
  • Category: Productivity
  • Licence: Free
  • Software version: 14.1.6
  • File size: 11.86 MB

Download ⇩


→   →   →   →   →  

Winmail Viewer - Letter Opener Features and Description

1. With over 10 years experience (and a special dislike for winmail.dat files) we made sure that working together with Microsoft Outlook and Windows users can be simple and seamless.

2. A winmail.dat file or MSG file is an email from Microsoft Outlook that can not be read by other email applications.

3. - Open Winmail.dat and MSG files and convert appointments, notes, contacts etc.

4. Open Winmail.dat, MSG and XPS files with just a tap.

5. - Get access to all attachments in Winmail.dat files.

6. It needs to be converted for the content to be accessible.

7. to iOS native formats.


  • - Works best for converting .msg files
  • - Apple Sr Tech Support helped locate the app
  • - Able to read precious messages thought to be lost
  • - Has been used almost every day for 3 years without any problems
  • - Able to open pdf and other files from Windows users
  • - Highly recommended

Download Winmail Viewer - Letter Opener Latest Version

Download and Install Winmail Viewer - Letter Opener - PC

Download for PC - server 1 -->

PC Alternatives:
Get Alternatives for Windows

MAC Download:
Download for MacOS - server 1 --> Free

Installation Requirements

PC Compactibility/Requirements for Installation

Compactible OS list:
  1. Windows 11
  2. Windows 10
  3. Windows 8.1
  4. Windows 7
  5. Windows Vista

Requirements for MacOS Installation

Intel, 64-bit processor, OS X 10.7 or later.

Compactible OS list:
  1. macOS Ventura: 13.3
  2. macOS Monterey: 12.6.4
  3. macOS Big Sur: 11.7.5
  4. macOS Catalina: 10.15
  5. macOS Mojave: 10.14
  6. macOS High Sierra: 10.13


Winmail Viewer - Letter Opener - Is it safe to download?

Yes. The app is 100 percent (100%) safe to download and Install. Our download links are from safe sources and are frequently virus scanned to protect you

Software Reviews and Criticism

  • By Tom1964

    Works Perfectly

    The thing I want in a program like this is that it just plain ol' works without me thinking about it. This program solves the problem I've had of PC users sending me attachments as dat files that I couldn't open on my Windows. Now I can. The developer even proactively reached out to me to see if I was having any issues. Pretty great customer service, I'd say.

  • By The Great C

    Letter Opener Gets My Vote

    Letter Opener Gets My Vote for being a great program. I have used it almost every day for the past 3 years and have not had any problems. I receive pdf & other files all day long from window users & have never had a problem opening the files. I highly recommend it! John from Houston, Texas

  • By kristen 999999

    works great

    this application works great. i often get attachments from PC users in that dat format I can’t open/read on my Windows - this solves that problem like a charm. it was easy and fast to install. also you aren’t taken to another screen to open attachments; it’s seamless—you just click on it and it opens.

  • By username_ladiesman217

    Does EXACTLY what it needs to do.

    I need to open Outlook emails with Windows Mail. I can do this transparently with this app. I forget I have it sometimes. Works perfectly, but I am sometimes annoyed with the request to rate the app. This is NOT the developer’s fault, but a problem with the Microsoft App Store, so don’t downvote this app because of that.

Leave a review or comment