I want to make any emails sends between users of journals forwarded to a specific email address as cc

i made some modification on config.ini.php but i did not sure if that works or not

; Use SMTP for sending mail instead of mail()
smtp = On

; SMTP server settings
smtp_server = smtp.gmail.com
smtp_port = 465

; Enable SMTP authentication
smtp_auth = ssl
smtp_username = "user@gmail.com"
smtp_password = "password"