How to open winmail.dat files on Ubuntu and Debian Linux
Friday, November 6, 2009 posted by Till
The winmail.dat file is a container file format used by Microsoft Outlook to send attachments in richtext formatted emails. To open winmail.dat on Linux, use the tnef utility.
Installation
sudo apt-get install tnef
Usage
Open a shell window, navigate to the directory where the winmail.dat file is saved, then execute the command:
tnef winmail.dat
to extract all files that are stored in the winmail.dat into the current directory.
Thanks so much for the help. Worked Great
Thnks man!
It works perfect
Thanks, it saved my day!
Thank you this was very useful
Thank you. It works.
Thanks a lot, it worked well!
Thank You.
It was quick and easy. (A bit off but.. Happy holidays … ) 
Bingo Bango Bongo, worked like a charm. Damn Microsoft!
Thanks for the easy and working command
Excellent, thanks. Just what I needed.
This works perfect! thanks.
Ditto. I am always getting email from people and I plead to stop sending me .dat and .pub files. They keep doing it so thanks for solving that. Now all I need is a .pub converter……..sigh
Thanks to the author of this very useful piece of software.
Perfect !
Installed and used
Greetings
Hellmut
Nice tool, helped me a lot for reading pdf files.