Hello dear Friends. I just installed Zimbra on Centos 5,4 in my intranet and it's working perfectly, I can send mail between clients on the intranet but I don't know what to do in order to send the mail to internet, for example to yahoo and hotmail accounts, I don`t know in what place I have to configure. In my intranet I use the addresses 192.168.0.1 to 192.168.0.50 with mask 255.255.255.0. Thanks a lot any help