How To Add A Confidentiality Notice In Outgoing Emails How Do I Automatically Add A "confidentiality Notice" To Outgoing E-mails?

How do I automatically add a "confidentiality notice" to outgoing e-mails? - how to add a confidentiality notice in outgoing emails

I work with sensitive materials and would like to add a notice of privacy that at least some of my outgoing e-mails. Is it a slap, that I come with a push of a button?