Relay email from internal postfix server to postfix gateway/smarthost server

[cimmron]

Hi, Im noob to postfix.

I have managed with great effort, to setup a postfix mail server with dovecot, postfixadmin, apache2 and webmin with a MySQL database
and it all works. I can create mulitple domains and emails addresses for each domain. Emails are coming in and going out just fine.

I want to setup a client with a similar server and they want to do large internal emailing and for outgoing mail,
they must use my postfix mail server. I have been reading oreilly_postfix_the_definitive_guide and The Book of Postfix - State
of The Art Message Transport, all week and stil not getting the results Im looking for.

Could someone please help!! I have looked at all the posts I could find and tried them all. I just cant seem to get comms across.

If you could please post some detailed information, such as if I need to create the same domains and users on both servers. The configurations
for main.cf, master.cf and any other changes. I'll post my config files when needed.

Thanks again.

Adrian

[jledhead]

adding a smarthost in postfix is as easy as adding this to your main.cf
relayhost = your.gateway.com


the next step would be deciding on how to handle this mail on the gateway machine