GMAIL has a CONFIDENTIAL MODE for emailing sensitive information.
If you have to email sensitive information, using Confidential Mode in Gmail is a great option. The recipient will not be able to forward, copy, print, or download the email that you send. The printer icon does appear in the received email but when they click on it, the recipient will get a message that the email can't be printed. You can also set an expiration date so that the email will no longer be available to the recipient after the expiration date. Also, if a sender deletes a Confidential email, the recipient will no longer have access to it. For even more protection, you can require a passcode. If you require a passcode, you (the sender) will need to provide a cell phone number for the recipient. When you click on Send, you will see a window asking you to enter the recipient's cell phone number. When the recipient receives the Confidential email, they will see a message that says a code will be sent to their cell phone. They will have to enter the code before they can open and read the email.
