How to Encrypt an Email
An email message can contain highly sensitive material that you must protect in case it is mistakenly sent to the wrong recipient. One way of keeping unauthorized people from reading your email is by encrypting it. Encrypting a message will change the email from a form that can be read to one that is indecipherable without the correct software. In order to encrypt an email, you must have a program that will do so because free Internet-based email accounts will not. Microsoft Outlook is a commonly used email software that allows you to encrypt messages.
Open Microsoft Outlook and draft your message.
Click the "Options" box in the "Message" tab. In the "Options" window, click "Security Settings" under the "Security" heading. This opens a "Security Properties" window.
Select the "Encrypt message contents and attachments" option. After you check the box, click "OK" to close the "Securities Properties" window. Close the "Message Options" window.
Send your message. Your message is encrypted.