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How to Prevent Winmail.dat Attachments from Being Sent in Outlook

This below-written article provides knowledge about how one Exchange Server administrator or end user can prevent the Winmail.dat attachment against being sent to Internet users when using the Microsoft Outlook.

When a person sends an email to intended person from Outlook client, a file attachment called Winmail.dat may be automatically added at the end of the message. The Winmail.dat file is not at all useful for the recipient. Therefore, the sender usually wants to avoid attaching winmail.dat whilst sending an email.

If you want to avoid Outlook from attaching winmail.dat when you send an email:

  1. Click File in Outlook.
  2. Select Options.
  3. Go to the Mail category.
  4. Make sure HTML or Plain Text is selected for Compose messages in this format: under Compose messages.
  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.

In a nutshell, it can be concluded that your query relating to preventing Winmail.dat Attachments from being sent in Outlook account email has been resolved. If not, or just in case you have got any other question concerning it be at liberty to contact to our Helpline number +1-844-888-3860.