» What is Winmail
Winmail.dat files are attachments sent by Microsoft mail applications (Outlook, Outlook Express or Exchange) on a propriertary format called TNEF
(transport neutral encapsulation format). Being a non-standard attachment format,
users from other e-mail clients (like Thunderbird or Lotus Notes) or platforms (like Android, Apple, iPad or iPhone)
cannot natively read them.
An e-mail containing an winmail.dat attachment looks like an empty e-mail with only one attachment.
The original e-mail information like subject, body and attachments is packed into a single winmail.dat file,
which in some cases also receives a generic name like ATT00001.dat or ATT00005.eml.
» How to open Winmail.dat files
Winmail.dat Reader is the only free application that decodes not only the embedded attachments but also the subject and body. It comes in three version:
» Additional information
To learn more about winmail.dat files, check also these links:
» Other native decoders
If you are looking for a Mac, iPhone, iPad or Linux solutions, check these ones:
» Suggested searches