blocking mail for more than 3 recipients from yahoo or gmail to my mail server

[veronica]

Need to use Policyd for that. Postfix Policyd - Zimbra :: Wiki

[fathianf]

Thanks for your reply, I will try to install policyd but I am afraid something goes wrong in installation and my zimbra gets down. My os is centos, do you have any comment for this os? And how should I configure policyd because in the document you refer, I can just install it but what is syntax of configuration for it