Seperate MTA - For incoming and Outgoing does not work

[blason]

Hi Folks,

I am setting up multi server installation where I will have one MTA to handle Incoming mail traffic, one for Outgoing emails and LDAP, Store, Spell, logger will be installed on separate server.

So, I would like to know what changes are needed on each server?

Here is my setup

192.168.1.138 - maili.pmx.net
192.168.1.139 - mbx.pmx.net
192.168.1.140 - mailo.pmx.net

The one which I know is to set up SMTP Host as mailo.pmx.net on mbx.pmx.net.
mx is any ways pointed to maili.pmx.net
On both the servers i.e. on maili and mailo SMTP Auth host would be mbx.pmx.net
Any thing else I am missing?

[blason]

OK _ i got it resolved it was corrupt LDAP schema and wrong zmsmtphostname parameter.