Insert "Privileged email" footer at the bottom of every email that is sent out

Insert "Privileged email" footer at the bottom of every email that is sent out

How do I set up Zoho Mail so that EVERY email has the following line? Does each individual user need to set it or can I set it company-wide?

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This email is confidential and may be privileged. If you have received it in error, please notify us immediately and then delete it.  Please do not copy it, disclose its contents or use it for any purpose.

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