Well I had read the wiki several times it is where I knew how to implement the blacklist/whitelist in the first place.
Anyway, it appears placing the whitelist/blacklist includes into the amavis.conf.in no longer works because there is no amavis.conf.in in the /opt/zimbra/conf folder. There is a amavisd.conf.in which I attempted to use but it did not work.
What I finally ended up doing was placing the includes into the amavisd.conf and now our whitelisting/blacklisting works again.
/opt/zimbra/conf/amavisd.conf
Code:
read_hash(\%whitelist_sender, '/opt/zimbra/conf/whitelist');
read_hash(\%blacklist_sender, '/opt/zimbra/conf/blacklist');