I received an email from a friend with an attachment named “winmail.dat”. I tried to open with Microsoft Word, but it wouldn’t open. I did a Google search to determine what type of file this is.
I found this. “What is this winmail.dat file?
Many times you might receive an email with an attachment called winmail.dat. The file is sent from people using Microsoft Outlook as their email program. The file allows Outlook users to send Transport Neutral Encapsulation Format (TNEF) information along with the email so that it retains the look and feel of the document with formatting, fonts, and colors when its received by another Microsoft Outlook user.
Unfortunately, the file is only relevant and used by Microsoft Outlook. Users of Outlook Express, Eudora, Netscape Messenger, and other email programs will receive the attachment called winmail.dat with the email. The file is attached to the email because the original sender is sending emails in Microsoft Outlook Rich Text Format instead of Plain Text format. “
In the Google search I also found a free Mac app, called
TNEF’s Enough, that will convert/open the file. Versions are available for OS 9 (& below) and OS X.