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To download Winmail.dat Viewer - Letter Opener Lite from the Mac App Store, you need a Mac with OS X 10.6.6 or later. Learn More.

Winmail.dat Viewer - Letter Opener Lite

By Atlan Creative GmbH

Open the Mac App Store to buy and download apps.


Letter Opener Lite - Open winmail.dat, .msg and .xps files.
• Browser attachment of a winmail.dat file like other attachments
• Preview of winmail.dat using QuickLook
• Convert nested messages
• Convert Schedules, Appointments and Task for iCal
• Convert Contacts for Address Book
• Convert Notes
• Convert Delivery receipts and read receipts

Please refrain from sending your bug reports or feature requests using the App Store. Instead, to ensure a direct response from us send them to We’re always happy to help our users and receive their comments!

What's New in Version 3.0.7

• Bug fixes and improvements.

If you like Letter Opener, please consider leaving a review. That helps us a lot. Thanks!


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Customer Reviews

Does the Job

Maybe i’m spoiled by the easiness of Mac software but i find this a litle bit harder to use , a litle bit more confusing than the Mac app i’m used to. Nevertheless it DOES do the job well enough. No crashes , no hiccups.

Great little tool!

I am working in an environment where .msg files are attached to tickets that need to be addressed. This provided what I needed to view these files.


Had no way to open my clients attachments… until now! Work flawlessly! thanks Letter Opener!!

Winmail.dat Viewer - Letter Opener Lite
View in Mac App Store
  • Free
  • Category: Productivity
  • Updated:
  • Version: 3.0.7
  • Size: 7.5 MB
  • Languages: English, Dutch, French, German, Italian, Japanese, Korean, Portuguese, Russian, Simplified Chinese, Spanish, Swedish
  • Seller:

Compatibility: OS X 10.8 or later, 64-bit processor

Customer Ratings

Current Version:
All Versions:

Top In-App Purchases

  1. Winmail.dat Premium$9.99
  2. MSG Premium$9.99
  3. XPS Premium$5.99
  4. File Extension Repair Premium$4.99

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