thanks,

I've got exim rather than postfix, but I'll give it a go...

R

From: [email protected] [mailto:[email protected]] 
On Behalf Of marco rosenstein
Sent: 18 June 2013 15:50
To: Baruwa users list
Subject: Re: [Baruwa] Rejecting mail for unrecognised recipients

if you are using postfix like I am, you can set up a list called 
relay_recipients with all your users in it in this format:

[email protected]<mailto:[email protected]>          OK

add the line to your postfix main.cf file like this

relay_recipient_maps = hash:/etc/postfix/relay_recipients

pointing to where ever your file is.

Then after you compile the list, run

postmap /etc/postfix/relay_recipients

run that any time you edit the list.

You can pull your AD users and export them to the list also.  Follow point 17 
of this tutorial:

http://www.howtoforge.com/the-perfect-spamsnake-ubuntu-jeos-12.04-lts-precise-pangolin-p4

You can set this to run as a script to keep this list updated and automatically 
"postmapped".

I imagine you can use a similar setup for exim or whatever mail you are using.
________________________________
From: [email protected]<mailto:[email protected]>
To: [email protected]<mailto:[email protected]>
Date: Tue, 18 Jun 2013 11:13:16 +0000
Subject: [Baruwa] Rejecting mail for unrecognised recipients
Hi,

How do I set up Baruwa to reject / not accept email for addresses that are NOT 
on a list (or in the Baruwa DB)?

Kind Regards,
Ritchie Fraser
Systems Administrator

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