Behind The Firewall Zimbra Installation

Hi,How to create Zimbra Mail Server Behind the Firewall and What Settings we have to do for resolving the Private Ip with my Public Ip.

I am Getting Following Error While Installation–The Error

DNS ERROR resolving MX for zimbra.local-dns.com

It is suggested that the domain name have an MX record configured in DNS

Hello there

I hope the port forwarding is set up to direct traffic to the private IP address of the server. the domain mx record to the public IP.

I hope the hostname and domain of the server are set correctly in the zimbra admin console. Make sure the DNS settings on the server are set up;
Verify the DNS records and make sure the mx record is set up correctly for the domain if the error continues.

I hope this will helpful for you.