AmaVis-New optimisation for Linux CentOS Server

I need some assistance with a Server config that is running on CentOS 6.8 with postfix, spam-assassin, AmaVis-New, etc. All is working fine but I have other projects so I cant study very much deeper, therefore I look for someone that can assist in some finetuning. Basically the issue is simple. I need someone that look over the AmaVis-New config to assist in finetuning the config. There are 3 known issues. 1. There is only 1 polecy which is: $policy_bank{'ORIGINATING'} However it should have 2 policy_banks, which are originating mail and outside mail. At the moment all emails that originate from my server or that arrive from outside are treated the same. This is not optimal because I need to be more easy going on the emails that originate for my server and nore strict to emails arriving from outside. 2. Currently I block all zip files because for some reason the system did not extract them to check them with ClamAV. However, I want to change this so that zip files that are not encripted or password protected ant have approved content, are received. Only zip files that have blocked content or are encripted or password protected are removed. 3. Lastly all domain keys are setup and where working before, but since all emails are treated as non-originating it is not applied. This is the nutshell version. Please do not apply for this is you are not very familiar with a linux mail-server set-up and especally AmaVis-New this is esential. Please let me know a bit about your experience in setting up Linux servers and secure email enviornments.