Now you can go back to your file and change the file extension from. Option 1: Change the File Extension Within the Folder Options window, switch to the View tab once more and uncheck the option Hide extensions for known file types. Locate the DAT file on your system and the click the “Open” button.
It’s quick and simple to use, with no hidden costs, registration or email required. Click on the File drop down and select “Open.” Click the down arrow for the Files of Type option and select the “All Types” option. How many times have you come across pesky and puzzling, impossible to open ‘winmail.dat or ATT0001.dat’ files attached to your email This handy, free online tool saves you from frustration, giving you easy access to their contents. Play with Microsoft Media Player Double-click the Windows Media Player icon on your desktop. DAT winds up as an attachment that is not processed. If the recipient email system is not Exchange or cannot decipher RTF, WINMAIL. DAT is a UUencoded file that is sent from a Microsoft Outlook or Exchange email client. dat file into a readable Rich Text Format (RTF) document which can be opened in Microsoft Word (or, if you don’t have Word, a built-in computer program like WordPad or TextEdit).Ī file that contains RTF format codes in order to support rich text in email messages. This service will translate your winmail. The program called Winmail Reader handles the task of viewing the winmail.dat files without any troubles. The Winmail.dat Reader will open automatically and decode the file for you. Open the winmail.dat file In your email client, select to open the winmail.dat file you’ve received as an attachment. dat files with this application and press OK.