Outlook is used by millions of people around the world, but that doesn’t mean that the person you’re sending your email to will be using Outlook as well. This normally isn’t an issue, but there have been many instances where an email sent from Outlook to an Internet email inbox results in the recipient only receiving a plain text message with a winmail.dat attachment. This happens quite often, and can be headache inducing for both parties involved.
What is a winmail.dat attachment?
Mail programs all handle email formats in different ways. When messages are sent from Microsoft Outlook or Microsoft Exchange Server, there is a chance that the recipient will see the winmail.dat attachment if they don’t have their mail program setup to handle messages in the Microsoft Outlook Rich Text Format. The Rich Text Format is different because it allows the display of different styles, fonts, and colors within the email. All of that Rich Text information is stored in the winmail.dat file, and Outlook occasionally attaches regular file attachments in the winmail.dat file as well.
Stop Outlook from Sending the Winmail.dat Attachment
The good news is you CAN stop Outlook from sending this attachment out to others who will have a lot of trouble opening it. Here’s how to stop winmail.dat:
- In Outlook click on File and then select Options
- Within the Options go to Mail
- Now you need to make sure that where it says Compose messages in this format: that HTML or Plain Text is chosen.