Prevent Winmail.dat Attachments from Being Sent in Outlook  

To prevent Outlook from attaching winmail.dat when you send an email:

 

  1. Select File in Outlook.

     

  2. Select Options.

    Options button in Outlook File menu
  3. Go to the Mail.

    Mail category in Outlook options
  4. Make sure HTML or Plain Text is selected for Compose messages in this format: under Compose messages.

    Compose message format: HTML, Rich Text, Plain Text in Outlook
  5. Now make sure Convert to HTML format or Convert to Plain Text format is selected for When sending messages in Rich Text format to Internet recipients under Message format.

  6. Click OK.