Jason T. Slack-Moehrle:
> I am building a new CentOS 6.5 server. In the past I have just used Zimbra
> for ease. Not, since I am behind a pfsense box that does some IP mapping
> Zimbra requires a "split-dns" setup.
>
> I thought that it might be time to cum out Zimbra and just use Postfix,
> Dovecot, etc. I gound a great tutorial.
>
> So I have 5 statics and the pfSense box answers to all and forwards the
> traffic to the correct box that has a private IP.
>
> In this case, xx.xx.xx.27 -> 192.168.1.27
>
> 192.168.1.27 is the IP address of the mail server.
>
> Am I going to still need this same "split-dns" setup? I cannot decide if it
> is something Zimbra needs or something I would need in any setup...
If Postfix runs on a "private" IP address, you need to configure
the "public" IP address in main.cf:proxy_interfaces to avoid mailer
loops. Additionally, Postfix requires that it knows the source IP
address of remote SMTP clients (some gateways replace the remote
SMTP client IP source address by their own IP address).
I am not familar with the details of Zimbra, so I don't know why
it needs a different view of DNS than external systems, except of
course to find other systems on the private network.
Wietse
