Hi
perhaps i have done confusion
clear all please
this is my situation:
my domain is hosted in service in
www.register.it
there i set my domain name A, MX record etc with public ip
then i have a public access to internet with my firewall and my public ips
and nat rules
behind i have private network where i installed zimbra on suse with bind
I have configured bind not with my public ip but with my private ip with A and MX record
Zimbra respond to telnet on port 25 and send and receive is ok
only