Set the Default Message Format in Outlook
To configure the default format for new emails in Outlook:
- Select File | Options in Outlook.
- Open the Mail category.
- Choose the format you want to use as a default for new emails under Compose messages in this format:.
- Click OK.
Set the Default Message Format in Outlook 2000-2007
To set the default message format in Outlook:
- Select Tools | Options from the menu in Outlook.
- Go to the Mail Format tab.
- Choose the format you want to use as a default for new messages in the Compose in this message format: list.
- Click OK.