Winmail.dat, MSG, MHT Viewer

Letter Opener GmbH

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.

Ratings and reviews

Has been perfect until now, but won't open files after recent update (error messages indicating 'unrecognised format'). I tried restarting the phone, but it made no difference. UPDATE: I installed a different app which DID then open files correctly, however, I was now getting a prompt asking me choose which app to use. Out of interest I had a go with Letter Opener again - what do you know, it now worked again! I deleted the new programme and Letter Opener continues to work...

Very good .msg viewer. Open the file for seconds, mail text as original (compared with Outlook) and all files in the message accessible. Thank you!

Can't shrink the email to view without scrolling. The scrolling locks out too. Not good at all.

What's new

Initial Release 🎉