Encryption should be used to protect sensitive information when using e-mail to send such information.
Sending and encrypted e-mail from Outlook
1. When sending a new e-mail, select "OPTIONS" from the the menu bar
2. Click on encrypt and then select "Encrypt-Only"
3. You will then see a notice that the e-mail will be encrypted. Continue with the e-mail as normal.
Receiving an encrypted e-mail
If recipient is using a non-Microsoft e-mail account, they will receive an e-mail informing them of an incoming encrypted e-mail.
Clicking on read the message will present options for how to retrieve the e-mail.