Originally Posted by till
A greylisting service must be integrated in postfix as postfix is the mailserver. ISPConfig is just a controlpanel and the greylisting seamon works in a step of the email process before any ISPConfig scripts are involved.
Perhaps, but for resellers or clients to control it (turn it on and off, change settings), they need to be able to configure it. From the HowTo Killing That Spam With Postgrey And Postfix http://www.howtoforge.com/greylisting_postfix_postgrey
The Postfix configuration files are located in /etc/postfix. Edit /etc/postfix/main.cf and add check_policy_service inet:127.0.0.1:60000 to the smtpd_recipient_restrictions. It should look something like this :
smtpd_recipient_restrictions = permit_sasl_authenticated,
I don't see that this is configurable using ISPconfig ...