Dears ,
i have set new zimbra open source edition 8.0.4 , i have mta server behind firewall with ip 212.x.x.x in DMZ and we have local lan users , i have set my zimbra trusted network to only 127.0.0.0/28 212.x.x.x/32 , i check externally open relay (using online test tools) and it give me its not open relay system , but if i do open relay test from lan (using telnet 25) it give me that my system is open relay , note that i cant trust my internal users .
any suggestion .....