Send encrypted messages with Advanced Email Security
With Microsoft 365 from GoDaddy, all messages in your organization are automatically encrypted, and you don't need to do anything differently. However, when sending to recipients outside of your organization, you need to take an extra step to encrypt messages. That's where the Advanced Email Security add-on comes in.

Once your Advanced Email Security account is set up, you automatically have a filter to send encrypted email by including [Encrypt] in the subject line. You only need to do this if you're sending to an external recipient (like to a customer) with an email address not on your organization's domain.
Your recipient will receive an email with instructions on how to sign in to Advanced Email Security to view and respond to the encrypted message. This email is available for 14 days, and can't be saved locally by the recipient.
More info
- Here are ways you can customize Advanced Email Security.