Winmail.dat, MSG, MHT Viewer

4.1
15.9K reviews
500K+
Downloads
Content rating
Everyone
Screenshot image
Screenshot image
Screenshot image

About this app

Open 📎 Winmail.dat, MSG, EML and MHT files easily and securely

Letter Opener has always been the perfect app to open Winmail.dat and MSG e-mail files—the format used by Microsoft Outlook and Exchange—and also internet standard EML email files. And it’s even easier and more secure with Letter Opener for Android. Your files are never transferred or shared when you use Letter Opener, and your files and content stays protected on your device.

Privacy and security

Privacy and security aren’t just something you should hope for—they’re something you should expect. That’s why we never transfer or shared your files. Everything is done on your trusted device. Your emails stay your business.

Supported file types:

• winmail.dat or AT00001.dat
• Outlook messages: .MSG
• Outlook templates: .OFT
• E-Mail files: .EML, .EMLX
• Web archive files: .MHT, .MHTM, .MHTML

Made with a special 😤 for winmail.dat files.
Updated on
Nov 4, 2020

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
This app may collect these data types
App activity and App info and performance
Data is encrypted in transit
Data can’t be deleted

Ratings and reviews

4.1
14.6K reviews
Peter Dugstad
May 30, 2020
Never could open any winmail.dat attachment and even when using other winmail opener apps, I had to search for the file after it had been downloaded and try to have it opened with that specific application. It was always a frustrating and time consuming proposition. With this app, the first time was a charm! I opened up an email with a winmail.dat attachment, downloaded the attachment and BINGO! Everything opened automatically! Very pleased!
97 people found this review helpful
Did you find this helpful?
David Deal
June 8, 2020
I receive a lot of forwarded attachments that come as a .dat file. I installed outlook and still couldn't open them. Since installing this app, I just click the attachment in my email app and this app does the rest. Excellent app! Saves me from having to go to a pc to read email attachments. Huge timesavings.
51 people found this review helpful
Did you find this helpful?
David Wolfson
April 2, 2023
This software does exactly what it claims. When you open an email on an android phone that has an attachment shown as winmail.dat, when you try to open the attachment, the email opens in a different format with a pdf download link at the bottom of the page. Just click on the download button and you will be able to open the attachment if you have a pdf reader on your phone. A great piece of software.
11 people found this review helpful
Did you find this helpful?

What's new

Initial Release 🎉