Send an email to the erroneous email address you sent to originally. Say that you are recalling the previous email, that the email was sent in error and ask th

Send an email to the erroneous email address you sent to originally. Say that you are recalling the previous email, that the email was sent in error and ask the recipient to keep the contents confidential, delete the email and any copies of the information contained in the email. Word it nicely but firmly. I am NOT a lawyer, ...