dkim with latest ispconfig

are there tutorials or any documents to get dkim up and running on ispconfig 3 (followed this install https://www.howtoforge.com/perfect-...l-php-pureftpd-postfix-dovecot-and-ispconfig3)
i have everything up and running already i just need to add dkim

thank you
Ben

 

yes i am sorry i by mistake wrote it in linux and not in ispconfig forum, so i re-wrote it here!