I read alot posts in this forum, but didnt found solution for my needs. I have small office network with samba+ldap(as PDC) and postfix. I want to migrate to zimbra, but i dont know which FQDN to use. I have DNS server on separate machine inside my network (ex. 10.0.0.0/24) my postfix is 10.0.0.5. External DNS MX record is mail.example.com ex. 18.104.22.168 NATd to 10.0.0.5 , but my internal MX record for 10.0.0.5 points to "mail1.example" and my users use "mail1.example" in their email clients to access the server.
Which one i have to use for zimbra installation as FQDN? I tested zimbra 5-6 months ago and i had problems.