[SOLVED] Exchange and Zimbra behind NAT

[phoenix]

Originally Posted by bryan08

I get:
dig: '.exchangedomain.org' is not a legal name (empty label)

I don't understand why it's not taking the local ip from hosts file. Do I have to edit route file or anything? Appreciate your help, Bill.

I'm not surprised that didn't work, I see I've given you a typing error. Sorry. Run the same commands again without the leading period and post the output to this thread.

Just for confirmation run the following

host mail.exchangedomain.org

[bryan08]

I did some research on the net and I was able to solve my problem. I found out that postfix bypass /etc/hosts file because it did not find A or MX record for mail delivery.
I don't know much about postfix but here is what I did after refering to sites listed below.
Created a file called mytransport under /opt/zimbra/conf/
Type:

exchangedomain.org         smtp:[192.168.0.118]

In command line as zimbra user typed:
1.

zmlocalconfig -e postfix_transport_maps=ldap:/opt/zimbra/conf/ldap-transport.cf,hash:/opt/zimbra/conf/mytransport

2.

postmap /opt/zimbra/conf/mytransport

3.

zmmtactl stop; start

References:
postfix transport maps
Postfix Frequently Asked Questions
The Answer Guy 31: 'sendmail' requires DNS ... won't use /etc/hosts

Thank you Bill and Phoenix for all your help. I hope this will help someone in the future.