I sent out about 7k emails yesterday and got this as a warning;
you may need to increase the master.cf smtp-amavis process limit
So I did a quick search and found an interesting thread that stated;
"If the MTA Networks includes the IP of your router then you have become a open relay"
I know this has nothing to do with my warning but I was curious if I have this problem, so I ran;
zmprov gs 'zmhostname' zimbraMtaMyNetworks
And got this;
zimbraMtaMyNetworks: 127.0.0.0/8 myinternalip/24 myexternalip/30
Does anyone have any insight as to if I am running an open relay and if so how do I stop it?