Audit Outgoing Mail
Copy Outgoing Mail to Another Account
This will copy any mail sent by a user to an audit account as a copy.
Create a file called sender_bcc in /etc/postfix and edit the file so that you have two columns, the first column represents the user you want to audit and the second column is the user the mail is blind carbon copied.
tsmith@example.org audit@example.org
Hash the file with this command:
postmap hash:/etc/postfix/sender_bcc
