I just registered and hope this works.
I run a HP Proliance Rackserver with CentOS 6.4 and Zimbra Release 8.0.5_GA_5839.RHEL6_64_20130910123908 RHEL6_64 FOSS edition.
I am an Apple Mac OS X Server convert and I am LOVING Zimbra!
I never new it could be so simple.
Now, I have an issue with greylisting.
I want to greylist sending domain, in my case, *.google.com and *.ebay.com.
According to the WIKI I followed
Postfix Policyd - Zimbra :: Wiki
It is possible to whitelist IP addresses.
But google.com has too many IP addresses for me to figure them all out.
The same goes for eBay and AOL.
I know Postgrey can do this, but I am trying to stay clear of third party and stick to Zimbra approved stuff.
Many thanks for a great forum.