We have an application that has email functionality written in coldfusion. Since the emails we send need to be encrypted we are hard coding a dummy social security number so that email will be automatically encrypted using the corporate Zix encryption software. Once the email is sent the person sending it gets an emal saying that the email was encrypted. This we keep as a sent receipt that the email was sent. However, how do we make sure the person getting it reads it. How can we generate a read receipt that would come back to the person sending that says " Your email was read at so and so time "