Install Mail Rate Limiting Issue

I have one virtualmin server that is currently running Centos 5.10 and was setup without the install.sh script. This server is running postgrey quite happily running greylisting on incoming mail though I don’t have a /etc/mail/greylist.conf file.

I have another server also Centos 5.10 that was setup using install.sh. This doesn’t have postgrey installed.

Both of these now have this nice new Mail Rate Limiting option that I wish to explore. However on both servers I have the issue, that virtualmin says the milter is not installed.

When I try to install it on either system the following occurs:

Installing the email rate limiting package …
Installing package(s) with command yum -y install milter-greylist …
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile

Both mail servers are running postfix. I thought postgrey was for postfix and milter-greylist was for sendmail. Please correct me if i am wrong.

What am I missing to setup this?

Many Thanks

This package was missing from the repo. It should now be added.