By default, when you reply to an e-mail message, the original message text is included in the message body. You can turn off this feature so that none of the original message is included.
- In the main Microsoft Outlook window, on the Tools menu, click Options.
- Click the Preferences tab, and then click E-Mail Options.
- Under On replies and forwards, in the When replying to a message box, click Do not include original message.