Postfix Relay to exchange server

[Madmax2]

Good Day

I Have a postfix server Ver 2.1.5 Receiving mail from ISP behind a firewall
I have Installed a Exchange Server Ver 6.5 on Server2003 R2 With Active Directory.
My goal is to get 10 users from my 130 users relayed to exchange and the rest to stay on postfix.
Is this possible
please assist

Kind Regards

Madmax2

[jledhead]

you can use transport maps to specify next hops
transport(5): Postfix transport table format - Linux man page
we are using this to deliver to 2 different mail servers

fakeuser@fakedomain     smtp[mailserver1]
fakeuser2@fakedomain        smtp[mailserver2]

in your case probably 100 users would all have the same next hop and then those 30 will have exchange as the next hop.

[Madmax2]

you can use transport maps to specify next hops
transport(5): Postfix transport table format - Linux man page
we are using this to deliver to 2 different mail servers

fakeuser@fakedomain     smtp[mailserver1]
fakeuser2@fakedomain        smtp[mailserver2]

in your case probably 100 users would all have the same next hop and then those 30 will have exchange as the next hop.

Thank you for your reply
I had a look at the document and used WinSCP3 to have a look at etc\postfix\transport file
Must be honest it is all greek to me
what would be my first step in this.
I only have to route 4 users out of the 130 to exchange

[Madmax2]

I have used Winscp3 edited the etc\transport file as
fakeuser@fakedomain smtp:[192.xxx.xxx.53]

but the mail does not get thru to exchange
do I need the nail user on the postfix box aswell

[Madmax2]

I have used Winscp3 edited the etc/postfix/transport file as
fakeuser@fakedomain smtp:[192.xxx.xxx.180]
192.xxx.xxx.180 as exchange server
but the mail does not get thru to exchange
do I need the nail user on the postfix box aswell

[jledhead]

after editing a db file in postfix (like the transport file) you need to do

postmap /etc/postfix/transport

you also need to reference it in your main.cf and either find this line and edit it or add it if its not there

transport_maps = hash:/etc/postfix/transport

[Madmax2]

I thank you SIR
much appreciated all is working well
have a great day